No. 1-ranked Jannik Sinner has led defending champion Italy to a comeback victory over Argentina for a return to the Davis Cup semifinals.

American pair Taylor Fritz and Ben Shelton have edged Carlos Alcaraz and Alexander Zverev in doubles to tie the Laver Cup after the first day in Berlin.

The women’s and men’s professional tennis tours have introduced new scheduling guidelines to prevent matches from starting after 11 p.m. except with approval and recommending a 6:30 p.m. start for night sessions at tournaments.

Novak Djokovic was tested by 61st-ranked Tomas Martin Etcheverry in a 7-6 (5), 6-2 opening win at the Italian Open.

Andy Murray was pleased with the result but not happy about the circumstances after finishing an Australian Open victory after 4 a.m. His marathon raised anew the issue that tennis has shown it is that rare sport where folks sometimes need to play all night.

Andy Murray and Thanasi Kokkinakis have played deep into the night at the Australian Open until Murray emerged with a five-set victory that ended just after 4 a.m. They began playing on Thursday and finished on Friday at Margaret Court Arena before hundreds of enthusiastic spectators who remained.

Andy Murray tries to back up his first-round victory over Matteo Berrettini by winning again and earning a trip to the third round of the Australian Open for the first time since 2017.

Two-time Wimbledon champion Andy Murray has lost in the second round to big-serving American John Isner.

Two-time champion Andy Murray’s second-round loss to John Isner is his earliest exit from Wimbledon.

Daniil Medvedev is one win away from returning to No. 1.

Tennis pro Nick Kyrgios says he had “suicidal thoughts” and dealt with depression and abuse of drugs and alcohol in the past.

Nick Kyrgios and Thanasi Kokkinakis — the so-called Special Ks — have won the Australian Open men’s doubles title with a 7-5, 6-4 win over fellow Australians Matt Ebden and Max Purcell.

Ash Barty has ended a 42-year drought by reaching the Australian Open final with a 6-1, 6-3 win over Madison Keys.

Ash Barty ended a long drought by reaching the Australian Open final with a 6-1, 6-3 win over unseeded Madison Keys.

Alize Cornet is into the fourth round at the Australian Open for the first time 13 years.

Spain's Rafael Nadal celebrates after defeating United States' Michael Mmoh during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Feb. 11, 2021. (AP Photo/Rick Rycroft)MELBOURNE – The Latest from the Australian Open (all times local):11:50 p.m.Rafael Nadal shrugged off some heckling from a spectator before beating American qualifier Michael Mmoh 6-1, 6-4, 6-2 in the second round of the Australian Open. The Australian Open is the first major in a year to allow sizeable crowds with the government allowing up to 50% capacity. Ad___11:20 p.m.Fabio Fognini and Salvatore Caruso clearly still hadn’t had enough of their all-Italian second-round duel at the Australian Open even after four hours and five sets. ___9:30 p.m.Fifth-seeded Elina Svitolina beat 16-year-old Coco Gauff 6-4, 6-3 in the second round of the Australian Open.

Spain's Rafael Nadal reacts during his first round match against Serbia's Laslo Djere at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 9, 2021. Daniil Medvedev extended his winning streak to 15 matches with a 6-2, 6-2, 6-4 win over Vasek Pospisil and seventh-seeded Andrey Rublev beat Yannick Hanfmann 6-3, 6-3, 6-4. 9 Matteo Berrettini defeated Kevin Anderson, a two-time finalist at majors, 7-6 (9), 7-5, 6-3. Barty lost to Sofia Kenin in the Australian Open semifinals last year and then skipped the U.S. Open and her title defense at the French Open because she stayed in Australia during the COVID-19 pandemic. AdTwo-time Australian Open quarterfinalist Tennys Sandgren also went through the hard lockdown.