Roger Federer admitted he had made serious errors in his planning for 2013 but insisted retirement is not on his agenda.
“I played matches that I should never have played,” said Federer.
“I should have left in Indian Wells (last March, with back pain) before the quarter-finals against (Rafael Nadal). This summer, I should not have tried to play on clay in Hamburg and in Gstaad.
“But things always look better in hindsight. I wasn’t able to train as I wanted during my seven-week break following Indian Wells. I fell into a negative spiral.”