Australian Open: Davydenko, Djokovic reach quarter-finals
MELBOURNE: Russian sixth seed Nikolay Davydenko and Serbian third seed Novak Djokovic strode into the Australian Open quarter-finals Monday while Li Na ensured China has two players in a Grand Slam last eight for the first time.
They joined Spanish defending champion Rafael Nadal, British fifth seed Andy Murray, American seventh seed Andy Roddick and 14th seeded Croat Marin Cilic safely through.
Davydenko was stretched to the limit by Spanish ninth seed Fernando Verdasco before
prevailing 6-2, 7-5, 4-6, 6-7 (5/7), 6-3.
Roger Federer attempts to join them later Monday with the 15-time Grand Slam champion playing Australia''s Lleyton Hewitt, who has not beaten the Swiss great in their last 14 meetings.
Whoever wins will next face Davydenko.
Defending champion Serena Williams was a class above local hope Sam Stosur, despite the 13th seed having home crowd support.
She ran out an easy 6-4, 6-2 winner and will play either Belarrussian seventh seed Victoria Azarenka or ninth seeded Russian Vera Zvonareva for a place in the semi-finals as she guns for a fifth title.
Sister Venus, seeded six, found the going tougher against Italian 17th seed Francesca Schiavone, losing the first set before bouncing back for a 3-6, 6-2, 6-1 win.
The sisters join Li, Justine Henin, Nadia Petrova, Maria Kirilenko and Zheng Jie in the last eight.
Djokovic powered into the quarters with an emphatic 6-1, 6-2, 7-5 win over Poland''s unseeded Lukasz Kubot and will meet either France''s Jo-Wilfried Tsonga, who he beat in the 2008 final, or Spanish 26th seed Nicolas Almagro.
The Serbian struggled with his form in the opening two rounds, but has moved up a gear and is back with the dominant touch he displayed in the second half of last year.