Novak Djokovic reached the fourth round at Wimbledon for the 15th time on Friday with a straight-sets defeat of old rival Stan Wawrinka.

Second seed Aryna Sabalenka recovered from a set down to beat France's Varvara Gracheva 2-6, 7-5, 6-2 and reach the last 32 at Wimbledon on Friday.

Daniil Medvedev returned to Wimbledon's Number Two court on Friday to wrap up a 6-3, 6-3, 7-6 (7/5) win against Adrian Mannarino after the match was suspended the previous evening due to poor light.

Defending champion Elena Rybakina booked her place in the Wimbledon third round but only after surviving a torrid second set against experienced Frenchwoman Alize Cornet, who needed a medical timeout after slipping late in Thursday's contest.

Novak Djokovic will play Stan Wawrinka for the 27th time in a storied rivalry when they clash on Friday but surprisingly they have never played each other on grass, let alone at Wimbledon.

The defending champion beat his unseeded Australian opponent 6-3, 7-6 (7/4), 7-5  to reach the third round, where he will meet Tomas Martin Etcheverry or Stan Wawrinka

Women's top seed Iga Swiatek outclassed Spain's Sara Sorribes Tormo 6-2, 6-0 and Daria Kasatkina thumped Jodie Burrage 6-0, 6-2 to reach the third round before organisers worked to clear the backlog of first-round matches.

World number one Carlos Alcaraz has warned Novak Djokovic he won't crack under pressure if the title rivals meet in the Wimbledon final.

Djokovic, 36, has only lost twice at Wimbledon in a decade and began the Centre Court programme with a 6-3 6-3 7-6(4) win over Argentine Pedro Cachin after a 70-minute delay despite the roof being closed as ground staff laboured to dry the turf

The roof was closed just after the Serbian seven-time champion wrapped up the first set 6-3 against Argentina's Pedro Cachin, with rain falling in southwest London on the opening day of the championships

The Swiss eight-time champion, who announced his retirement last September, will visit the scene of some of his greatest triumphs and be honoured before the start of play.

Last year's Wimbledon runner-up Nick Kyrgios has pulled out of the tournament with a wrist injury, the Australian said on Sunday before the start of the grasscourt grand slam on Monday.

The 36-year-old Serb, who has won the last four titles at the All England Club, opens proceedings on Centre Court where he has not lost in 10 years.

Defending women's champion Elena Rybakina will face American Shelby Rogers in the opening round at Wimbledon while top seed Iga Swiatek faces a tough test against China's Zhu Lin.

Novak Djokovic says he is still "hungry" for Grand Slam glory as Wimbledon rivals queue up to hail him as the "greatest" and his achievements as "phenomenal".

Last year's Wimbledon runner-up Nick Kyrgios will not place any unfair expectations on himself, the Australian said on Sunday as he gears up for the Grand Slam with little preparation after a knee injury decimated the first half of his season.

American world number four Jessica Pegula said doing business with Saudi Arabia can help the WTA in its quest to ensure equal prize money but it will carefully evaluate following other sports to the Gulf state.

Djokovic racked up a men's record 23rd Grand Slam title with a third French Open triumph last month

Venus Williams insists she's not ready to call time on her career, claiming on Saturday she is probably the only player able to keep competing until she's 50.

The All England Club's lawns will be the focus of the tennis world over the next fortnight as the world's leading players battle opponents and often their own psychological demons