Serena Williams drops his fourth set at the 2014 French Open . Williams returned to the Rod Laver Arena later on Monday , rooting on older sister Venus . But the Swiss rallies in a fourth -set tiebreak to advance . Serena Williams also rallies , against Garbine Muguruza . Stan Wawrinka and Novak Djokovic progress to the quarterfinals , too .
Serena Williams drops his fourth set at the 2014 French Open . But the Swiss rallies in a fourth -set tiebreak to advance . Serena Williams also rallies , against Garbine Muguruza . Stan Wawrinka and Novak Djokovic progress to the quarterfinals , too .