MELBOURNE, Australia (AP) — Two sets and just over an hour of tennis wasn't what Jannik Sinner wanted at Rod Laver Arena for the start of his bid for an Australian Open three-peat.
In his first competitive match since beating Carlos Alcaraz at the ATP Finals in November, Sinner was leading 6-2, 6-1 when No. 93-ranked Hugo Gaston suddenly retired from their match Tuesday night with an undisclosed injury.
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Naomi Osaka of Japan walks onto Rod Laver Arena for her first round match against Antonia Ruzic of Croatia at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Jannik Sinner of Italy serves to Hugo Gaston of France during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Karolina Pliskova of Czech Republic plays a forehand return to Sloane Stephens of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dita Alangkara)
Sloane Stephens of the U.S. plays a forehand return to Karolina Pliskova of Czech Republic during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dita Alangkara)
Ben Shelton of the U.S. plays a forehand return to Ugo Humbert of France during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Leylah Fernandez of Canada plays a forehand return to Janice Tjen of Indonesia during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dar Yasin)
Oleksandra Oliynykova of Ukraine plays a backhand return to Madison Keys of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys of the U.S. serves to Oleksandra Oliynykova of Ukraine during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys, right, of the U.S. is congratulated by Oleksandra Oliynykova of Ukraine following their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys of the U.S. waves after defeating Oleksandra Oliynykova of Ukraine during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
“I saw that he was not serving with a very high pace,” Sinner said, but “it’s not the way you want to win the match.”
After signaling he had to quit, Gaston went to a courtside chair and bowed his head into his hands. Sinner went to console him, putting a hand on the Frenchman's shoulder and wishing him a speedy recovery.
For Sinner, it was an anticlimactic return to Melbourne Park's main arena 12 months after clinching back-to-back Australian titles with a win over Alexander Zverev in the final.
He played Alcaraz in the finals of the other three majors, winning at Wimbledon and finishing runner-up at Roland Garros and the U.S. Open, as the so-called Sincaraz rivals extended their dominance of Grand Slam tournaments to a second full year.
Sinner isn't content with evenly splitting the titles with Alcaraz, though. He used his time off to concentrate on adjusting his service motion and tweaking other parts of his game in the search for incremental improvements.
“I’ve put in many, many long days in the off-season trying to become a better tennis player,” No. 2-ranked Sinner said. “But at the end of the day the most important part is to go on court and to enjoy, no? It’s very special to start the season in a night session match here in a Grand Slam, the packed stadium, just trying to do your best.”
Sinner is aiming to become the fourth player to win three consecutive men's titles at the Australian Open.
Wearing a wide-brim hat, veil and holding a white parasol as she walked onto Rod Laver Arena for the last night match, Naomi Osaka made a grand entrance.
The four-time major winner went on to beat Antonia Ruzic 6-3, 3-6, 6-4, and later explained the inspiration for her design.
“It’s modeled after a jellyfish,” Osaka said. “I’m just so grateful I get to do the things I love.”
Madison Keys had a tough start to her title defense, struggling early against the offbeat style of Oleksandra Oliynykova before advancing 7-6 (6), 6-1.
Ninth-seeded Keys, playing in her 50th Grand Slam tournament, trailed 4-0 before finding her rhythm.
“Obviously I was very nervous at the start,” Keys said. “As nervous as I was . . . I’m really glad to be back, and that I got through that match.”
Oliynykova's unorthodox shot-making and strong defense kept Keys off balance in the first set.
“I feel like that made things a little extra tricky,” Keys said. “I felt like at the end of the tiebreaker I really kind of found my game and then was able to carry that into the second set.”
Oliynykova gained a lot of attention with her unique body art and ink, and a printed message for Ukraine on a T-shirt she wore in her post-match news conference.
No. 5 Elena Rybakina and No. 10 Belinda Bencic advanced in straight sets, but two women’s seeds were ousted in straight sets early on Day 3, with Janice Tjen upsetting 2021 U.S. Open finalist Leylah Fernandez and Tereza Valentova beating Australia's Maya Joint.
Sloane Stephens, the 2017 U.S. Open champion who had to qualify the season-opening major, lost Karolina Pliskova 7-6 (7), 6-2.
In a match between left-handers, Ben Shelton, a semifinalist a year ago in Australia, overcame Ugo Humbert 6-3, 7-6 (2), 7-6 (5).
Shelton said it was one of the toughest first-round matches he could have faced, with No. 33 Humbert having the highest ranking of the unseeded players.
He'll next face Australian qualifier Dane Sweeny, who ended the 20th and final Australian Open campaign for 39-year-old Gael Monfils.
Also advancing were No. 5 Lorenzo Musetti, No. 9 Taylor Fritz, 2023 runner-up Stefanos Tsitsipas and Eliot Spizzirri, who beat 19-year-old Joao Fonseca 6-4, 2-6, 6-1, 6-2.
Naomi Osaka of Japan walks onto Rod Laver Arena for her first round match against Antonia Ruzic of Croatia at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Jannik Sinner of Italy serves to Hugo Gaston of France during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Karolina Pliskova of Czech Republic plays a forehand return to Sloane Stephens of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dita Alangkara)
Sloane Stephens of the U.S. plays a forehand return to Karolina Pliskova of Czech Republic during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dita Alangkara)
Ben Shelton of the U.S. plays a forehand return to Ugo Humbert of France during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Leylah Fernandez of Canada plays a forehand return to Janice Tjen of Indonesia during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Dar Yasin)
Oleksandra Oliynykova of Ukraine plays a backhand return to Madison Keys of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys of the U.S. serves to Oleksandra Oliynykova of Ukraine during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys, right, of the U.S. is congratulated by Oleksandra Oliynykova of Ukraine following their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
Madison Keys of the U.S. waves after defeating Oleksandra Oliynykova of Ukraine during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 20, 2026. (AP Photo/Asanka Brendon Ratnayake)
HELSINGBORG, Sweden (AP) — NATO allies and defense officials expressed bewilderment Friday at U.S. President Donald Trump’s announcement that he would send 5,000 U.S. troops to Poland just weeks after ordering the same number of forces pulled out of Europe.
The apparent change of mind came after weeks of statements from Trump and his administration about reducing — not increasing — the U.S. military footprint in Europe. Trump's initial order set off a flurry of action among military commanders and left allies already doubtful about America's commitment to Europe's security to ponder what forces they might have to backfill on NATO's eastern flank with Russia and Ukraine.
Earlier this month, the Trump administration said it was reducing levels in Europe by about 5,000 troops, and U.S. officials confirmed about 4,000 service members were no longer rotating into Poland from Germany. The dispatch to Germany of U.S. personnel trained to fire long-range missiles was also halted.
But in a post on Truth Social on Thursday, Trump said he would now send "an additional 5,000 Troops to Poland,” citing his strong ties with Polish President Karol Nawrocki, whom Trump endorsed in elections last year.
“It is confusing indeed, and not always easy to navigate,” Swedish Foreign Minister Maria Malmer Stenergard told reporters Friday at a meeting she was hosting of her NATO counterparts, including U.S. Secretary of State Marco Rubio.
Ministers from the Netherlands and Norway were sanguine about Trump’s latest move, as was Latvian Foreign Minister Baiba Braže, who said allies knew the U.S. troop “posture was being reconsidered, and now there is no change of posture. For now.”
U.S. defense officials also expressed confusion. “We just spent the better part of two weeks reacting to the first announcement. We don’t know what this means either,” said one of two officials who spoke on condition of anonymity to discuss sensitive military matters.
But Rubio said Washington’s allies understand that changes in the U.S. troop presence in Europe will come as the Trump administration reevaluates its force needs. “I think there’s a broad recognition that there are going to be eventually less U.S. troops in Europe than there has historically been for a variety of reasons,” he said.
The latest surprise came despite a U.S. pledge to coordinate troop deployments, including one from NATO’s top military officer, U.S. Lt. Gen. Alex Grynkewich, on Wednesday.
Trump's initial announcement that he would withdraw troops came as he fumed over remarks by German Chancellor Friedrich Merz, who said that the U.S. was being “humiliated” by the Iranian leadership and criticized what he called a lack of strategy in that war.
Trump told reporters that the U.S. would be cutting even more than 5,000 and also announced new tariffs on European cars. Germany is the continent’s biggest auto producer.
Rubio insisted that Trump’s decision “is not a punitive thing. It’s just something that’s ongoing.”
About 80,000 U.S. troops are stationed in Europe. The Pentagon is required to keep at least 76,000 troops and major equipment on the continent unless NATO allies are consulted and there is a determination that such a withdrawal is in U.S. interests.
The withdrawal of 5,000 troops might drop numbers below that limit.
But Trump's latest post suggests that troop numbers in Europe would not change. Polish Foreign Minister Radek Sikorski welcomed the decision to send more forces to his country, saying it ensures that “the presence of American troops in Poland will be maintained more or less at previous levels.”
NATO Secretary-General Mark Rutte also welcomed the move. On Thursday, before Trump took to Truth Social again, Rutte had underlined that it was important for Europe to take care of its own security. “We have a process in place. This is normal business,” he told reporters.
At NATO headquarters in Brussels, meanwhile, U.S. officials briefed the allies on the Pentagon's aims for its commitments to the NATO Force Model, which involves contingency planning for Europe’s defense in the event of serious security concerns. It was widely expected that a further reduction of U.S. forces would be coming.
Asked whether any cuts were announced, Rutte said: “I’m afraid it’s much more complicated than that.” He said the procedure “is highly classified” and declined to give details.
Rubio played down concerns about a shift in U.S. force levels in Europe, saying: "Every country has to constantly reevaluate what their needs are, what their commitments are around the world, and how to properly structure that.”
Cook reported from Brussels. Associated Press writer Emma Burrows in London contributed.
United States Secretary of State Marco Rubio speaks with journalists during a meeting of NATO foreign ministers in Helsingborg, Sweden, Friday, May 22, 2026. (AP Photo/Julia Demaree Nikhinson, Pool)
United States Secretary of State Marco Rubio, front second left, and NATO Secretary General Mark Rutte, front left, speak with each other during a group photo at a meeting of NATO foreign ministers in Helsingborg, Sweden, Friday, May 22, 2026. (AP Photo/Julia Demaree Nikhinson, Pool)
United States Secretary of State Marco Rubio, left, and NATO Secretary General Mark Rutte look at each other as they deliver a statement during a meeting of NATO foreign ministers in Helsingborg, Sweden, Friday, May 22, 2026. (AP Photo/Julia Demaree Nikhinson, Pool)
Latvian Foreign Minister Baiba Braže speaks at the doorstep of the NATO foreign ministers' meeting at Sea U in Helsingborg, Sweden, Friday, May 22, 2026. (Johan Nilsson/TT News Agency via AP)
United States Secretary of State Marco Rubio, left, and NATO Secretary General Mark Rutte deliver a statement during a meeting of NATO foreign ministers in Helsingborg, Sweden, Friday, May 22, 2026. (AP Photo/Julia Demaree Nikhinson, Pool)
NATO Secretary General Mark Rutte speaks to media at the NATO Foreign Ministers' meeting in Helsingborg, Sweden, Friday, May 22, 2026. (Johan Nilsson/TT News Agency via AP)
Secretary of State Marco Rubio arrives with his wife Jeanette at Malmo Airport, Friday, May 22, 2026, in Malmo-Sturup, Sweden, ahead of a NATO foreign ministers meeting. (AP Photo/Julia Demaree Nikhinson, Pool)
NATO Secretary General Mark Rutte, second from left, shakes hands with Prime Minister of Sweden Ulf Kristersson, as he is greeted by King Carl Gustaf of Sweden, Queen Silvia of Sweden and Minister for Foreign Affairs of Sweden Maria Malmer Stenergard, right, before a dinner at Sofiero Castle in Helsingborg, Sweden, Thursday May 21 2026. (Johan Nilsson/TT News Agency via AP)
Swedish Foreign Minister Maria Malmer Stenergard speaks to media at the NATO Foreign Ministers' meeting in Helsingborg, Sweden, Friday, May 22, 2026. (Johan Nilsson/TT News Agency via AP)