Federer cements favourite status in Raonic romp

The Serbian had dropped the opening set against the 11th seed on Wednesday and received immediate treatment on the right arm he appeared to injure in his fourth-round meeting with Adrian Mannarino.

However, just two games after resuming play Djokovic called an end to proceedings - meaning Berdych advances to his third Wimbledon semi-final 7-6 (7-2) 2-0.

Djokovic says the injury has been plaguing him for 18 months but Wednesday's match was a step too far having also played 24 hours earlier due to Rafael Nadal's marathon match with Gilles Muller on day seven.

"It's unfortunate that I had to finish Wimbledon this way," the three-time champion told a media conference. "I mean, if someone feels bad about it, it's me.

"I tried. I tried what I could do from yesterday to get it in the condition where I'm able to play. I was able maybe for 30 minutes to play with some pain that was bearable, let's call it that.

"All the treatments and medication couldn't really help.

"I spent 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 make me fit.

"But it wasn't to be. For an athlete, especially in an individual sport, there is no way out. If you don't feel fit, unfortunately that's it.

"The intensity and the level of pain was not decreasing. It was only increasing as the days went by. Actually, I started feeling it already more or less at the beginning of the tournament.

"Today was the worst day. 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."