But it was a different story at the US Open, where Djokovic admitted he didn’t feel like himself. “In New York, for instance, I felt that it wasn’t me on the court, that I was not well-prepared, so I felt more additional pressure ahead of every match compared to before the finals at the Olympics,” he added.

“Just because of the way I felt. Tennis is an individual sport – if you don’t have a solution on a given day, that’s it, you lose. Over the years, that kept me disciplined”.

But the world No. 4 appears to be back to normal ahead of Serbia’s Davis Cup World Group I playoff tie against Greece. The Serbs are hosting the tie in Belgrade this weekend and Djokovic said: “Being 100 per cent ready is no guarantee of winning anything but, of course, the chances are much higher.”