Spain's Rafael Nadal celebrates a point against Argentina's Leonardo Mayer during their Australian Open second round match in Melbourne yesterday. Pic/Getty Images

Rafael Nadal looked in ominous form as he powered into the Australian Open third round with a straight sets victory yesterday, a workout he deemed very important in his return from a knee injury. Spain's World No. 1 only dropped serve once in a dominant performance as he reeled off a 6-3, 6-4, 7-6 (7/4) victory over 52nd-ranked Argentine Leonardo Mayer in 2hr 38 min on Rod Laver Arena.