Another late start at the US Open as Sakkari and Haddad Maia take the court just before 11:30 p.m.

NEW YORK (AP) — The final match Saturday at the U.S. Open got underway closer to midnight than expected, when Maria Sakkari and Beatriz Haddad Maia took the court at Louis Armstrong Stadium at 11:28 p.m.

They were delayed by a nearly four-hour men’s match that ended when Felix Auger-Aliassime eliminated third-seeded Alexander Zverev in four sets. It lasted just 70 minutes, ending at 12:38 a.m. Sunday with Haddad Maia advancing to the fourth round.

“Thanks everyone who stayed to the end,” Haddad Maia said in her on-court interview. “I know it’s very, very late and you guys are supporting women's tennis, and this is very, very important for us.”

The American Grand Slam instituted a policy last year that a tournament referee can move any match that hasn’t gone on by 11:15 p.m. to another court. A U.S. Tennis Association spokesperson said the decision had been made after the fourth set of Auger-Aliassime versus Zverev that Sakkari and Haddad Maia would play either on Armstrong as scheduled or another court.

Had Auger-Aliassime and Zverev gone into a fifth set, the Sakkari-Haddad Maia match would have been moved elsewhere, the spokesperson said.

This was the seventh-latest start in Flushing Meadows, and it came a year to the day of the record-setter when Aryna Sabalenka and Ekaterina Alexandrova's night-session match began at 12:07 a.m. — technically on Aug. 31. It was not the latest U.S. Open start for Haddad Maia, who began a match against Bianca Andreescu at 11:38 p.m. in 2022.

Late-night matches and scheduling in majors has become a hot debate in the sport, notably also at the French Open and Australian Open. Wimbledon has an 11 p.m. curfew.

The final men's match of the day, Tommy Paul against Alexander Bublik, was only in the second set in Arthur Ashe Stadium when Sakkari and Haddad Maia started and was still going when they were finished. Iga Swiatek rallied from down 5-1 in the first set to beat Anna Kalinskaya to begin the night session on Ashe.

Paul played a post-midnight marathon match Thursday into Friday in the second round, defeating Nuno Borges in 4 hours, 25 minutes concluding at 1:46 a.m. His U.S. Open ended at 1:16 a.m. Sunday in a 3 1/2-hour, five-set loss to Bublik.

AP tennis: https://apnews.com/hub/tennis

Maria Sakkari, of Greece, returns a shot against Beatriz Haddad Maia, of Brazil, during the third round of the U.S. Open tennis championships, Saturday, Aug. 30, 2025, in New York. (AP Photo/Pamela Smith)

Beatriz Haddad Maia, of Brazil, returns a shot against Maria Sakkari, of Greece, during the third round of the U.S. Open tennis championships, Saturday, Aug. 30, 2025, in New York. (AP Photo/Pamela Smith)

Maria Sakkari, of Greece, returns a shot against Beatriz Haddad Maia, of Brazil, during the third round of the U.S. Open tennis championships, Saturday, Aug. 30, 2025, in New York. (AP Photo/Pamela Smith)

Beatriz Haddad Maia, of Brazil, reacts after winning the first set against Maria Sakkari, of Greece, during the third round of the U.S. Open tennis championships, Saturday, Aug. 30, 2025, in New York. (AP Photo/Pamela Smith)

OpenAI says it will soon start showing advertisements to ChatGPT users who aren't paying for a premium version of the chatbot.

The artificial intelligence company said Friday it hasn't yet rolled out ads but will start testing them in the coming weeks.

It's the latest effort by the San Francisco-based company to make money from ChatGPT's more than 800 million users, most of whom get it for free.

Though valued at $500 billion, the startup loses more money than it makes and has been looking for ways to turn a profit.

“Most importantly: ads will not influence the answers ChatGPT gives you,” said Fidji Simo, the company’s CEO of applications, in a social media post Friday.

OpenAI said the digital ads will appear at the bottom of ChatGPT's answers “when there’s a relevant sponsored product or service based on your current conversation.”

The ads “will be clearly labeled and separated from the organic answer,” the company said.

Two of OpenAI’s rivals, Google and Meta, have dominated digital advertising for years and already incorporate ads into some of their AI features.

Originally founded as a nonprofit with a mission to safely build better-than-human AI, OpenAI last year reorganized its ownership structure and converted its business into a public benefit corporation. It said Friday that its pursuit of advertising will be “always in support” of its original mission to ensure its AI technology benefits humanity.

But introducing personalized ads starts OpenAI “down a risky path” previously taken by social media companies, said Miranda Bogen of the Center for Democracy and Technology.

“People are using chatbots for all sorts of reasons, including as companions and advisors," said Bogen, director of CDT’s AI Governance Lab. “There’s a lot at stake when that tool tries to exploit users’ trust to hawk advertisers’ goods.”

OpenAI makes some money from paid subscriptions but needs more revenue to pay for its more than $1 trillion in financial obligations for the computer chips and data centers that power its AI services. The risk that OpenAI won’t make enough money to fulfill the expectations of backers like Oracle and Nvidia has amplified investor concerns about an AI bubble.

“It is clear to us that a lot of people want to use a lot of AI and don’t want to pay, so we are hopeful a business model like this can work,” said OpenAI CEO Sam Altman in a post Friday on social platform X. He added that he likes the ads on Meta's Instagram because they show him things he wouldn't have found otherwise.

OpenAI claims it won't use a user's personal information or prompts to collect data for ads, but the question is “for how long,” said Paddy Harrington, an analyst at research group Forrester.

“Free services are never actually free and these public AI platforms need to generate revenue,” Harrington said. “Which leads to the adage: If the service is free, you’re the product.”

FILE - The OpenAI logo is displayed on a mobile phone in front of a computer screen with output from ChatGPT, March 21, 2023, in Boston. (AP Photo/Michael Dwyer, File)