Argentinian Francisco Comesana stunned Australian Open finalist and world number two Alexander Zverev on Friday with a 4-6, 6-3, 6-4 win in the quarter-finals of the Rio Open, the biggest win of his career so far.
13 of the men's seeds fell at the first hurdle -- a Wimbledon record since 32 seeds were introduced in 2001.
IMAGES from Day 4 of the matches played at the Australian Open at Melbourne Park on Wednesday.
Images from the US Open men's singles second round matches, at Flushing Meadows, New York, on Wednesday.
World number two Gauff clawed her way back from a set down to defeat Russian Veronika Kudermetova 4-6, 7-5, 6-2 in a match that stretched over two and a half hours.
French Open champion Gauff is in line for a clash with fellow American Jessica Pegula.
24-year-old Sebastian Baez, who is looking to become the first two-time Rio Open champion, will take on Alexandre Muller after the Frenchman beat Francisco Comesana 7-5, 6-7(3), 6-3 in a marathon battle.
Third seed Andrey Rublev suffered a first round exit after his Qatar Open title, losing to qualifier Quentin Halys 3-6, 6-4, 7-6(5) at the Dubai Open on Tuesday.
Sweltering heat gripped the second-round action at the US Open on Wednesday
Novak Djokovic's bid for a record 25th Grand Slam title kicked off on Monday with an easy win over qualifier Radu Albot in the US Open first round.
Images from Day 3 of the French Open matches played at Roland Garros in Paris on Tuesday
Third seed Stan Wawrinka was sent packing in the round of 16 at the BNP Paribas Open in California on Wednesday and was very nearly joined by Rafael Nadal, who pulled off a Houdini-like escape to reach the last eight.
No complaints but quarantine differentials were a mistake: Zverev
Photos from the tennis matches played at Indian Wells on Tuesday
Rafael Nadal beat Alexandr Dolgopolov 6-3 6-3 in the Brisbane International first round on Tuesday to make a successful return to action following two-and-a-half months out due to injury. The Spanish former world number one, seeded fifth, made a sluggish start and fell 3-1 down in the first set against his Ukrainian opponent. But Nadal, 30, won four successive games to clinch the opening set and the 14-times grand slam winner broke twice in the second to see off 2012 Brisbane finalist Dolgopolov in one hour 15 minutes. He will next play Germany's Mischa Zverev.
Rafael Nadal continued to scythe his way through the Shanghai Masters on Thursday, reaching the quarter-finals with a 6-3, 6-1 thrashing of temperamental Italian Fabio Fognini.
World number one Simona Halep swatted aside American Nicole Gibbs while Maria Sharapova was flawless in her straight sets victory over Romania's Mihaela Buzarnescu in the opening round of the Shenzhen Open on Monday.
Wozniacki battles past Kerber into Eastbourne final
Nadal, who got a first-round bye, defeated Richard Gasquet 6-3, 6-4 to advance.
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.
A summary of sports events and sports persons, who made news on Tuesday
IMAGES from Day 3 of the US Open in New York on Wednesday.
PHOTOS from day four of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Thursday.
