Nadal is not sure about his form for the 2012 Australian Open

‘I know I am working well, with a much more positive attitude than I had during the second half of last season, especially in the final stretch,’ he said in an interview .

‘I see myself capable of having a good tournament but you never know. I am happy with the level of my game, of how I am doing things and I think I am sowing seeds that will bear fruit. But maybe not in Australia.’

Mental, and in some moments also physical fatigue, but mainly mental,’ said Nadal. ‘In some moments the season was a bit heavy for me. It is many years of a routine, of maximum intensity every week.

‘When a new season starts, everything is different. At least you have to do everything in your reach to make it so.’