Top-ranked Novak Djokovic beat German veteran Philipp Kohlschreiber 6-3, 6-1 Wednesday to reach the quarterfinals of the Dubai Championships and remain unbeaten in 2020.

Djokovic broke for a 4-2 lead in the first set and went 4-0 up in the second before wrapping up the win in 59 minutes. The Serb is 15-0 this year, including six wins at the ATP Cup and his run to the Australian Open title.

“It was a great performance,” Djokovic said. “I enjoyed the way I played, coming out with the right focus and tactics.”

Serbia's Novak Djokovic serves to Germany's Philipp Kohlschreiber during a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)

Serbia's Novak Djokovic serves to Germany's Philipp Kohlschreiber during a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)

Djokovic will next face seventh-seeded Karen Khachanov of Russia, who beat Austrian qualifier Dennis Novak 6-3, 6-4.

Second-seeded Stefanos Tsitsipas defeated Alexander Bublik 7-6 (1), 6-4 to set up a meeting with Jan-Lennard Struff, who needed just 39 minutes to ease past Nikoloz Basilashvili 6-1, 6-0.

Third-seeded Gael Monfils of France took his winning streak to 11 matches by ousting qualifier Yasutaka Uchiyama 6-1, 6-2. Monfils is coming off victories at Rotterdam and Montpellier.

Germany's Philipp Kohlschreiber returns the ball to Serbia's Novak Djokovic during a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)

Germany's Philipp Kohlschreiber returns the ball to Serbia's Novak Djokovic during a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)

He will face fellow Frenchman Richard Gasquet, who ousted No. 8 Benoit Paire 6-4, 6-4.

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Serbia's Novak Djokovic celebrates after he beats Germany's Philipp Kohlschreiber in a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)

Serbia's Novak Djokovic celebrates after he beats Germany's Philipp Kohlschreiber in a match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Wednesday, Feb. 26, 2020. (AP PhotoKamran Jebreili)