MADRID, May 4 (Xinhua) -- Chinese tennis ace Li Na beat Czech Iveta Benesova in straight sets in the second round of the 8.585-million-euro Madrid Masters tennis tournament on Wednesday.

Li, the world No.6, needed only 58 minutes to outclass Benesova 6-1, 6-4 with five aces and three breaks of serve.

The 2011 Australian Open finalist will next take on Roberta Vinci of Italy, who also enjoyed an easy win on Wednesday, ousting Russia's Alisa Kleybanova 6-2, 6-2.