India's Sania Mirza said she had to turn on the aggression to win her first round match at Wimbledon yesterday.

World number 85 Mirza beat Germany's Anna-Lena Groenefeld 6-2, 2-6, 6-2 in one hour, 51 minutes on Court 14. Groenefeld is ranked 23 places above the Indian number one.

Mirza, who has never made it past the second round at Wimbledon, now faces number 28 seed Sorana Cirstea, who beat her fellow Romanian Edina Gallovits 7-5, 6-1 on the adjacent Court 15.

"It's always the best thing to come out in a slam and get that first win under your belt," Mirza told AFP.

"I knew I was playing someone ranked much higher than me and she's been playing good tennis. I'm just happy that I could pull through that one in the third set and that I stepped it up a little bit.