Samantha Stosur has made an impressive start to her French Open campaign to join fellow Australian Ajla Tomljanovic in the second round.

Riding high after claiming her first title of the year in Strasbourg at the weekend, Stosur downed rising American Madison Brengle 6-1 6-3 on Monday.

The victory thrust the 2010 finalist into a clash on Wednesday with French wildcard Amandine Hesse, who earlier eliminated Jarmila Gajdosova in three sets.

Tomljanovic was the first Australian through to round two after storming past compatriot Casey Dellacqua in straight sets.

Tomljanovic dropped serve in the opening game of the match before taking 12 of the next 14 games to advance 6-2 6-2 in 62 minutes on Monday.

The 22-year-old world No.58 struck 29 winners to Dellacqua’s seven to progress to a second-round meeting on Wednesday with either German 11th seed Angelique Kerber or Hungarian Timea Babos.

“Casey’s a very tricky player and we’ve had some tough matches in the past so I was ready to battle today,” Tomljanovic said.

“Even if the scoreline says it was easy, it really didn’t go that way.

“I had to stay focused from the beginning and I’m very happy with this and the way I performed today.”

Coached in tandem by Samantha Stosur’s mentor David Taylor, Tomljanovic upset former world No.2 Agnieszka Radwanska en route to the last 16 in Paris last year and looms as a dark horse to make another strong run in 2015.

Like Dellacqua, Gajdosova and fellow Australian Sam Groth crashed out of the claycourt major on Monday.

Gajdosova suffered a disappointing 2-6 6-3 6-2 loss to French wildcard Amandine Hesse, while her ex-husband Groth was gallant in a 6-7 (5-7) 6-3 6-3 6-3 loss to accomplished 21st seed Pablo Cuevas.

Ranked 272nd in the world, Hesse had never previously won a grand slam match before.

After taking the opening set, Gajdosova’s game dropped off as the local hope raised hers to thrill a partisan French crowd on Court 3.