Andy Murray today withdrew from his quarter-final with defending champion Andy Roddick in the Artois Championships.
Murray suffered a thumb injury during yesterday's victory over Ernests Gulbis and decided not to risk causing any further damage at Queen's Club today.
The British number one missed Wimbledon last year with a serious wrist injury but said yesterday: "I'm guessing it will be fine for Wimbledon."
Murray suffered the injury during the first set against French Open quarter-finalist Gulbis, but after receiving treatment he recovered to secure a 5-7 6-1 6-4 victory.
However, after the match he admitted he was "pretty concerned" about the problem.
"A sprain tends to get worse the next day but I can play through the pain barrier if it's not affecting my grip and as long as the doctor says I'm not going to make it worse," he said.
"I'll see what it's like in the morning and if it's worse then I will try to get something done.
"If I can't hold on to the racquet properly, and Roddick is hitting 140mph serves, that's probably not the best thing for a sprain, I guess."