Third seed Novak Djokovic became the highest profile casualty of Wimbledon this year when he crashed to a straight sets defeat to Marat Safin on Centre Court.
The Serb was helpless as Safin rolled back the years en route to a 6-4, 7-6, 6-2 victory.
And Djokovic admitted he had struggled to find any rhythm.
He said: "I didn't do anything I was supposed to do.
"He was serving very well and putting a lot of pressure on me.
"I was serving a lot of double-faults which is unusual.
"I just couldn't find any momentum."
Djokovic produced an error-strewn display to crash to the world number 65.
And the world number three revealed it was not just a case of poor form.
He added: "I was mentally tired today.
"It's been a long season, even though it is only halfway through.
"Physically I wasn't tired - he was just better than me on the court."
Despite admitting his obvious disappointment Djokovic was still eager not to overplay the situation.
He explained: "Of course it's disappointing.
"But what can I do?
"This is just part of the sport - a loss.
"I just have to take the best things out of it.
"Life goes on."
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