A back Injury was the main reason why Federer didn't reach last stage of the French, Wimbledon and the US Open last year.
The man from Switzerland was no longer steady and consistent enough during his matches.
Yet we were kind of reassured by his summer. He was playing so much better. His matches against Djokovic and Tomas Berdych in Toronto brought the 'old Roger' back: focused from the first to the last point, crushing, offensive.
His footwork was again in shape and his whole game was benefiting from it, and so we had huge ambitions for him in New York. But in the US Open he didn't display any of this. Moving too slow, not really inspired in his attacking game was lacking some of his aggression abilities.
Federer needed to admit that he had been playing many matches with an injured back.
If we're paying a lot of attention to the way he played in New York, to the way he moved, we could easily believe it. Anyway, this Federer wasn't the big champion we know he is.
After the US Open Federer decided to work harder than ever on his fitness and it showed.
Federer played five indoor tournaments at the end of last year, something he had never done before in order to be fit for this year's Australian Open. He finished last season claiming the Masters while defeating Söderling, Djokovic , Murray and Nadal in the final.
By the way Nadal played the final with a thigh injury caught after his marathon match played the day before against Andy Murray.
Federer lost to Djokovic in 2008 due to mononucleosis.
2008 and 2010 were the years when Federer was not in top shape. Then he became beatable.
However when Federer is fit only Rafael Nadal can have a shot a beating him.