Reece James was forced out of his comeback match for Chelsea as injury again got the better of the defender who missed England's World Cup campaign.
The right-back sat out the Qatar 2022 finals because of a knee blow sustained on Champions League duty against Milan on October 11.
Tuesday's Premier League game against Bournemouth at Stamford Bridge was James' first game back, having returned to training at the start of December.
However, he lasted only 51 minutes before injury struck again, with Chelsea 2-0 ahead at the time.
James appeared to feel a twinge after beating Bournemouth's Jaidon Anthony to the ball, and he immediately signalled to the bench he needed to be replaced.
James went down to the ground, covering his face and looking to be in trouble.
He was treated by Chelsea medical staff before being able to stand up and walk off the pitch, passing head coach Graham Potter as he departed to have the pain checked out.
Before the game, Potter had described James as being "in a good place" again after the "brutal" experience of having to sit out the World Cup.
