Novak Djokovic, who retired down a set and a break to Tomas Berdych at Wimbledon, says he may have to take a break from competition.
The Serb confirmed the injury was an elbow problem, saying, "It's the elbow that already keeps bothering for over a year-and-a-half, actually."
Djokovic was playing for the second day in a row, having had his fourth-round match delayed on Monday.
"I tried what I could do from yesterday, you know, to get it in the condition where I'm able to play. I was able maybe, you know, for 30 minutes to play with some pain that was bearable," he said. "I spend probably about two hours, two-and-a-half hours, today on the table in between the warm-up and match, trying to do everything I possibly could to, you know, make me fit.
"It was only increasing as the days went by. Actually, I started feeling it already, more or less, at the beginning of the tournament. Probably the fact that I played yesterday; kind of days adding up, you know, as I've said before, it wasn't helping at all."
