Defending champion Andy Murray reached the semi-finals of the Olympic men’s singles with a 6-0 4-6 7-6 (7-2) win over American Steve Johnson.
Murray cruised through the first set, before world number 22 Johnson levelled after breaking the Briton’s serve in the first game of the second set.
Johnson broke again in the third, but Murray rallied and won in a tie-break.
World number two Murray is back on court later on Friday alongside Heather Watson in the mixed doubles.
The pair are scheduled third on Court Two for their quarter-final with India’s Rohan Bopanna and Sania Mirza.
“It was tough,” said the Scot of his win over Johnson. “I got off to a great start and then Steve started to play much better.
“We didn’t get to practise before the match as much because of the rain so he may have started a bit slow because of that, but when he started to find his rhythm, it was a very tough match and I just managed to turn it around in the end.”