Rafael Nadal faces potential quarterfinal clash with Nikolay Davydenko at Russian Open . The Russian sixth seed has beaten the world No . 1 in their last 1 meetings . Defending champion Rafael Nadal faces possible last-eight tie with Andy Murray . Nadal could then face Australia Open champion Andy Murray in semifinals .
Roger Federer faces potential quarterfinal clash with Nikolay Davydenko at Australian Open . The Russian sixth seed has beaten the world No . 1 in their last two meetings . Defending champion Rafael Nadal faces possible last-eight tie with Andy Murray . Nadal could then face U.S. Open champion Juan Martin Del Potro in semifinals .