Melbourne: Nikolay Davydenko continued his run at the Australian Open with a tense 6-2 7-5 4-6 6-7 6-3 fourth round victory over ninth seed Fernando Verdasco on Monday.
The Russian sixth seed, the form player on the men's tour over the past six months, had not lost a set coming into the match but the Spaniard showed in the third and fourth sets that he was vulnerable.
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Verdasco, who made the Australian Open semi-finals last year, sent the match to a deciding set, however, the Russian achieved the crucial break in the sixth game and clinched victory when the Spaniard's return crashed into the net.
He will next face either world number one Roger Federer or Australia's Lleyton Hewitt in the quarter-finals.