The Williams bandwagon rolled out of Roland Garros on Friday when sisters Venus and Serena were humbled in the third round by a pair of tenacious opponents who never lost belief. A day after the French Open lost three top-10 seeds, 2002 champion Serena joined them at the exit squeue as he roared and screamed her way to a 6-4 6-4 mauling by Katarina Srebotnik.