Federer hits back to beat Davydenko

World number one Roger Federer recovered from a set down to overcome his recent tormentor Nikolay Davydenko 2-6 6-3 6-0 7-5 and continue his remarkable run of reaching grand slam semi-finals.

Davydenko had beaten Federer in their previous two meetings and began confidently to roll through the opening set before grabbing an early break in the second.