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.
Renata Zarazua, the only Mexican player in the US Open main draw, pulled off a stunning upset by beating sixth seed Madison Keys in the first round.
Tenth seed Lorenzo Musetti rallied from a set down to beat Frenchman Giovanni Mpetshi Perricard in the first round of the US Open on Tuesday even as Carlos Alcaraz mauled big-serving American Reilly Opelka and veteran Venus Williams made an emotional exit.
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.
Top seed Carlos Alcaraz overcame Croatia's Marin Cilic to reach the round of 16 at the Qatar Open.
Top seed Carlos Alcaraz withstood a charge from qualifier Luca Nardi for a 6-1, 4-6, 6-3 victory in the second round of the Qatar ExxonMobil Open in Doha on Wednesday.
Marin Cilic had never beaten a Top-5 player on grass in his entire career before Thursday.
IMAGES from Day 2 of the Wimbledon Championships, at the All England Lawn Tennis and Croquet Club, London, on Tuesday.