Samantha Stosur is carrying Australian hopes at the French Open after straight-set, second-round defeats for Jarmila Gajdosova and Bernard Tomic.

Gajdosova lost 6-1 6-4 to Danish ninth seed Caroline Wozniacki on Thursday after Tomic suffered a disappointing 6-4 6-1 6-3 to Santiago Giraldo, a lowly-ranked Colombian he beat just two weeks ago in Rome.

While content with his progress on clay this season, Tomic was happy to leave the red dirt behind and head for greener pastures after bombing out with a flurry of unforced errors.

“I can’t wait to get on the grass,” the 2011 Wimbledon quarter-finalist said.

“It’s now time for me to play well. I’m very confident on grass.”

Tomic won seven matches on clay over the past two months – having only had one previous success in his entire three-year pro career – and is feeling upbeat before taking a week off and then warming up for a return to the All England Club with appearances at Eastbourne and Halle.

“Grass is my favourite surface and I believe this has helped me a lot, this claycourt run the last six weeks for my body,” the 19-year-old said.

“I’m very, very fit now … the one week I take off now and train for two weeks, I think when Wimbledon comes I’ll be ready.”

Tomic’s exit from Roland Garros, though, meant he failed to live up to his 25th seeding and he will be under pressure to defend a bundle of rankings points at Wimbledon after his charge last year to the quarters.

The loss also dashed hopes of a third-round showdown in Paris with Andy Murray.

“It always happens when you think of that match ahead of you – it comes back and bites you,” Tomic said.

“That’s why you’ve just got to focus on the players ahead of you.

“I knew today was going to be tough if I was going to win, but he actually played well and broke my momentum sort of and there wasn’t really a lot I could do.”

Gajdosova’s sixth loss from six matches against Wozniacki left Stosur as the only Australian with the chance to make the second week in Paris.

The 2010 Roland Garros runner-up, Stosur confronts Russian rival Nadia Petrova on Friday (about 2200 AEST) for a place in the last 16.

Stosur trails Petrova 5-2 head-to-head, but the two have never clashed on clay.