v 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 González faces possible last - 16 tie with Andy Murray . Murray could then face U.S. Open champion Juan Martin del Río 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 González faces possible last - 16 tie with Andy Murray . Murray could then face U.S. Open champion Juan Martin del Río in semifinals .