Swiss top seed Roger Federer overcame a lacklustre performance to beat Russian fifth seed Nikolay Davydenko 2 9 4 9, 7 4 Lrb 9 5 Rrb, 1 7 Lrb 7 7 Rrb and reach the semi Finals of the Australian open Wednesday.
Federer beats Davydenko in four sets to reach Australian open Semis.