Andy Murray advanced to the second round of an ATP Challenger event in Bordeaux after his opponent, Kyrian Jacquet, retired at the start of the second set.
Murray was ahead 7-5, 2-0 when the Frenchman, ranked 219th in the world, decided he could not continue.
The Briton was making his return from ruptured ankle ligaments sustained at the Miami Open in March.
Despite the match ending prematurely, the Bordeaux crowd serenaded Murray with 'Happy Birthday' in celebration of his 37th birthday.
In the next round, Murray will face Gregoire Barrere, who defeated Spain's Albert Ramos-Vinolas 7-6, 6-2.
To expedite his recovery, Murray chose not to undergo surgery for his ankle injury, aiming to compete in the French Open, Wimbledon, and the Paris Olympics this summer.
The three-time Grand Slam champion has indicated he does not plan to "play much past this summer," though he has not revealed which tournament will be his last.
British number three Dan Evans, the fifth seed, also progressed to the next round by defeating France's Hugo Grenier 6-4, 6-4.