Since we first began our coverage of the 2009 US Open, most of the grunting hotties have been eliminated from the Grand Slam competition. But luckily, there’s still quite a few stunners set to hit the court as they head into the Quarterfinals. First up, Na Li will go up against 2009 heavyweight, Kim Clijster today. And Flavia Pennetta is set to go up against the powerhouse, Serena Williams.