Perhaps Novak Djokovic hitting himself in the head with his racquet was a bad sign. Roger Federer had just won a routine service game to go up 6-5. It was on serve. But Djokovic got angry. Even John McEnroe, who was a terror on the court, commented on Djokovic’s outburst.
2010 U.S. Open, Men’s Semifinals: Federer Takes Third Set
About two minutes later, Djokovic had been broken -- at love -- and the third set went to Federer, 7-5.
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