World No 1 Jannik Sinner cancelled a practice session on Tuesday, fuelling fears his bid for a first Wimbledon title could be undone by an elbow injury.
The Italian suffered the problem after falling in the first game of his fourth-round clash with Grigor Dimitrov on Monday.
Sinner trailed the Bulgarian by two sets when Dimitrov was dramatically forced to retire after injuring a pectoral muscle.
However, the US and Australian Open champion's reprieve could be short-lived.
Sinner said after the match he would have an MRI scan on his elbow to assess the damage.
"It was quite an unfortunate fall," said Sinner.
"I could feel it. So let's see. Tomorrow (Tuesday) we are going to check to see how it is, and then we see."
The three-time Grand Slam champion is due to play American 10th seed Ben Shelton in the second match on Court One on Wednesday.