World tennis number one Roger Federer has beaten Nikolay Davydenko in the Australian Open quarterfinals.
After losing the first set 2-6, the Swiss star stormed back to win 6-3, 6-0 and 7-5.
"I've played him many times before, and I know he goes through some rock-solid phases at times," Federer said. "I just tried to stay positive."
Federer's victory snapped a 13-match Davydenko winning streak after the Russian player won the season-ending ATP World Finals in November at London and his 20th career title in Doha earlier this month.
He beat Federer in both tournaments.
Federer, who already has the all time record of grand slam victories with 15, is bidding for his fourth Australian title.
He will now play French tenth seed Jo-Wilfried Tsonga in Friday's semifinal. Tsonga beat Serbian third seed Novak Djokovic 7-6 6-7 1-6 6-3 6-1.
swissinfo.ch and agencies