World No 1 Jannik Sinner cancelled a practice session on Tuesday amid fears his Wimbledon bid could be scuppered by injury ahead of his crucial quarter final clash against the USA's Ben Shelton.

The 23-year-old Italian hurt his elbow after slipping on the baseline in the first game of his fourth-round match with Grigor Dimitrov on Monday evening. Sinner reached the quarter-finals despite trailing 6-3, 7-5, 2-2 against the Bulgarian 19th seed, who had to retire after suffering an apparent pectoral injury.

But Sinner, who needed a medical timeout himself during the second set, revealed afterwards he would need an MRI scan on his right elbow on Tuesday. He underwent the scan in the morning and a scheduled practice session at 4pm on Wimbledon’s Aorangi Park was subsequently cancelled.

“It was quite an unfortunate fall,” he said on Monday night after his match. “I checked the videos a little bit, and it didn’t seem a tough one, but I still felt it quite a lot, especially on serve and forehand. I could feel it. So let’s see. We are going to check to see how it is, and then we see.”

Sinner, a three-time grand slam champion, is due to play American 10th seed Ben Shelton in the second match on Court One on Wednesday afternoon. Also in action in the quarters, Flavio Cobolli will attempt to upset former world number one Novak Djokovic.

Mirra Andreeva will tackle Belinda Bencic in the other clash of the day on court one.                                                                                

From 3.30 pm

• Mirra Andreeva [7] v Belinda Bencic (SUI)
• Flavio Cobolli (ITA) [22] v Novak Djokovic (SBR) [6]

From 3 pm

• Iga Swiatek (POL) [8] v Liudmila Samsonova [19]
• Jannik Sinner (ITA) [1] v Ben Shelton (USA) [10]