Jacob Fearnley moved into an all-British meeting with Cameron Norrie in the French Open third round after his opponent Ugo Humbert retired following a nasty fall.
Fearnley, who replaced Norrie as the British number two earlier this year, was leading 6-3 4-4 when French 22nd seed Humbert quit.
Humbert tumbled as he stretched for a return at 40-40 in the eighth game and instantly clutched his right leg.
After receiving treatment and wearing heavy strapping, Humbert gamely tried to continue and finished the game before deciding it would not be sensible to carry on.