Madrid, Spain, 7 May 2012 | AFP

Belgian Yanina Wickmayer has beaten Australian Jarmila Gajdosova 6-2 6-4 in 66 minutes in Madrid, despite 11 aces from the loser.

Gajdosova showed flashes of her serving brilliance in the first round match, but was unable to achieve any consistency with her delivery, producing nine double faults and landing just 48 per cent of her first serves.

It was Gajdosova’s first match since injuring her ankle against Nadia Petrova in Estoril last week.

Wickmayer will next face Italian Roberta Vinci, who upset No.14 seed Dominka Cibulkova.

Former No.1 Caroline Wozniacki rolled an ankle but battled on to post a 7-6(7) 3-6 6-4 opening win over Ksenia Pervak of Kazakhstan.

The sixth-seeded Dane struggled on with her handicap to take victory in a match lasting more than three hours, saving an amazing 14 of the 22 break point she faced.

The 2009 runner-up will now have time for her injury to heal before facing on-form German Mona Barthel, a quarterfinalist a week ago in Stuttgart.

Fourth seed Agnieszka Radwanska dismissed Spanish opposition with her defeat of Lara Arruabarrena-Vecino 6-3 6-1 while 12th seeded Angelique Kerber of Germany started with a 6-1 6-4 win over Swede Johanna Larsson.

The world’s top two women, Victoria Azarenka and Maria Sharapova, also advanced in straight sets.