"This is only the second time that I withdrew a tournament and I never during a match moved.". "It is a sad moment for me, the tournament and fans, but health is first place."
Federer is confident, clarify a few days of rest to see the problem.
"I have bad back on the past, but this is not very good, otherwise I will play in any case," said.
"I feel no game and with good treatment, thanks to is going to get in the coming days.". It is my personal opinion now.
"But then of course I have continues me to travel in Australia, but I hope perhaps in mid-week next week I new should be 100%.". But that is simply by guessing.
Federer's withdrawal means that final Tsonga crosses world ATP tour for its 13.
Tsonga had a revenge with Federer, expect to were he beat at Wimbledon and ran almost 2011 in the global final of ATP in the last game of the season.
Federer lost semi-final here last year and will now go a step further - final against Rafael Nadal, French Open champion, or Gael Monfils, his fellow Frenchman.