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 lost serve before deciding it would not be sensible to carry on.
As a result, 23-year-old Fearnley – who is 55th in the world after a rapid rise over the past 12 months – moved into the last 32 on his French Open debut.
Norrie booked his place earlier on Thursday with a 7-6 (9-7) 6-2 6-1 win over Argentine qualifier Federico Gomez.
The 29-year-old has slipped to 81st in the rankings, but has rediscovered his form on the clay and earned one of the most satisfying wins of his career when he beat former world number one Daniil Medvedev at Roland Garros earlier this week.
The British pair will play each other for the first time on Saturday.
