of Russia suffered a shock 2nd round loss at Wimbledon this year at the hands of Daniel Brands of Germany.
Davydenko has come back from 2 sets to love down in his 1st round match against Kevin Anderson of South Africa.
Last year Davydenko took the tennis world by storm when he won the title at the O2 Arena in London, the ATP World Tour Finals where the best 8 players for the year compete.
Davydenko beat Juan Martin Del Potro in the final 6-3 6-4, having beaten Federer in the Semi Finals in 3 tight sets.
The Russian then started the year in superb style winning the ATP Event in Doha once again beating Federer and Rafael Nadal, however Davydenko did lose to Federer in the Quarter Finals of the Australian Open and since then he has struggled with injury.
The Russian will be hoping to come back strong at the US Open.