World No 1 Novak Djokovic was beaten by Tomas Machac in the Geneva Open semi-finals.
A summary of Friday's action in the Davis Cup group stage matches.
Rafael Nadal trailed in the second set before overcoming No. 5 seed Cameron Norrie of Great Britain.
Putting up a brave fight, India's Sumit Nagal took a set off world number seven Holger Rune before losing his rain-hit second round match of the Monte Carlo Masters, in Monte Carlo on Thursday.
Meanwhile, Sumit Nagal was trailing in his second round men's singles match against Holger Rune of Denmark, when rain led to a suspension of the contest.
India's Sumit Nagal becomes 1st Indian to win match at Masters on clay since 1990!
Spain's Rafael Nadal said on Wednesday that he is not sure if he will be able to play at next month's French Open.
Images from the US Open men's singles second round matches, at Flushing Meadows, New York, on Thursday.
World No. 1 Carlos Alcaraz entered the third round of the French Open with a win over Taro Daniel.
Tsitsipas made short work of Norwegian eighth seed Casper Ruud as he seized a third Monte Carlo Masters title in four years with a 6-1, 6-4 victory on Sunday.
Images from Day 2 of the 2024 Australian Open in Melbourne on Monday.
Former Davis Cup captain Anand Amritraj is baffled that India's best singles players are not able to win close matches on the ATP World Tour despite having a decent game to back them.