Britain's Jack Draper had to retire from his fourth-round match with Carlos Alcaraz at Indian Wells because of a stomach muscle injury.
Draper, who also had heavy strapping on his right leg after a recent hip issue, trailed by a set and 2-0 at the time.
His serve speed started to drop late in the first set and he shook hands with Alcaraz after just 46 minutes on court.
"I was doing further damage, so there was no point in making it worse,"
Draper, who also had heavy strapping on his right leg after a recent hip issue, trailed by a set and 2-0 at the time.
His serve speed started to drop late in the first set and he shook hands with Alcaraz after just 46 minutes on court.
"I was doing further damage, so there was no point in making it worse,"