Rafael Nadal's conqueror Steve Darcis withdrew from Wimbledon on Wednesday with a shoulder injury, organisers said.
Defending champion Serena Williams is the top seed in the women's draw. The American will be looking to equal Steffi Graf's Open era record by sealing a 22nd Grand Slam triumph.
Serbia carved out a 2-0 lead over rivals Croatia while Britain led the US by the same score and holders Switzerland were tied with Belgium in the Davis Cup.
Top seed Serena Williams turned an early challenge into an eventual cakewalk as she beat Russian-born Yulia Putintseva 7-6(2), 6-0 in the third round of the BNP Paribas Open in California on Sunday.
A round-up of results from Davis Cup matches played on and Sunday
A summary of sports events and sports persons, who made news on Thursday
A round-up of results from Davis Cup matches played on Saturday and Sunday
Defending champion Andy Murray eased into the Wimbledon quarter-finals for the 10th successive year with a 7-6(1), 6-4, 6-4 victory over Benoit Paire on Monday.
Images from Day 4 of the US Open in New York on Thursday.
World No 1 Novak Djokovic and Serena Williams advanced safely to the next round of the US Open on Saturday but the women's draw saw yet another big upset as Wimbledon winner Petra Kvitova was sent packing by a 145th-ranked qualifier.
Top seed Agnieszka Radwanska's title defence at the Sydney International lasted just 92 minutes when she was dumped out of the second round by Bethanie Mattek-Sands on Tuesday.
Third seed Rafael Nadal battled through mid-match cramps for more than an hour before he lurched into the third round of the Australian Open with a 6-2, 3-6, 6-7(2), 6-3, 7-5 victory over American qualifier Tim Smyzcek.
Images from Day 6 of the Australian Open in Melbourne, on Saturday.
Photos from the Wimbledon matches on Day 1
Sania Mirza recently added a mixed doubles gold from the Asian Games to her three Grand Slam titles in the same category, and is ranked world No. 7 in doubles. However, Indian tennis legend Vijay Amritraj says he would have loved to see her do well in singles and fulfil her true potential.
Former World No 1 Ana Ivanovic was upset 7-5, 6-4 by 42nd-ranked Karolina Pliskova of the Czech Republic in the second round of the US Open on Thursday.