Novak Djokovic sent out a warning to his Wimbledon title rivals with an impressive straight-sets victory over Stefanos Tsitsipas to reach the Wimbledon third round for the 20th time on Wednesday.

Stefanos Tsitsipas said on Thursday he seriously considered retiring from tennis in the depths of a struggle with serious back pain during much of the 2025 season.

The 12th-ranked Greek, who will return to top 10 on Monday, also won the title in the principality in 2021 and 2022.

An inspired Stefanos Tsitsipas handed Jannik Sinner his second loss of the season on Saturday as the two-time champion reached the Monte Carlo Masters final 6-4, 3-6, 6-4.

"I'm glad things turned around," Tsitsipas added. "I'm glad I showed the fight and spirit that I usually show on court so it feels great."

Stefanos Tsitsipas' bid for a third consecutive Monte Carlo Masters title was ended after a straight-sets loss to American Taylor Fritz in the quarter-finals on Friday, while Daniil Medvedev was knocked out by Holger Rune.

Stefanos Tsitsipas said he is relishing a return to the European claycourt season as the Greek world number three targets a third consecutive Monte Carlo Masters title in the build-up to the French Open starting next month.

Facts and figures ahead of Sunday's Australian Open men's final (x denotes seeding):

Novak Djokovic has won all nine of his previous Australian Open finals so confidence is sky-high as he bids to equal Rafael Nadal's Grand Slam record and return to world number one.

Stefanos Tsitsipas will become Greece's first Grand Slam champion and a world number one if he wins the Australian Open final on Sunday -- he will have his father to thank if he does.

Facts and figures ahead of Friday's Australian Open men's semi-finals (x denotes seeding):

Third seed Stefanos Tsitsipas kept his unbeaten streak this year intact Friday with another romp at the Australian Open to set up a round of 16 clash with dangerous Italian Jannik Sinner.

Novak Djokovic had enough of an edge at the beginning and the end as he beat Stefanos Tsitsipas 6-4, 7-6 (7/4) on Monday in the ATP Finals, a defeat that ended the Greek's hopes of finishing the year at number one.

Colombian qualifier Daniel Galan stunned fourth-seeded Greek Stefanos Tsitsipas 6-0, 6-1, 3-6, 7-5 in an epic first-round showdown at the U.S. Open on Monday, winning the affair on the ninth match point.

Greek fourth seed Stefanos Tsitsipas labelled Nick Kyrgios a "bully" with "an evil side" to his character after losing a bad-tempered Wimbledon third-round clash on Saturday.