Agnieszka Radwanska
Agnieszka Radwanska returns a backhand to Ajla Tomljanovic during their match at the French Open.Reuters

Agnieszka Radwanska has been knocked out of the 2014 French Open, while Samantha Stosur has cruised into the fourth round by beating Dominika Cibulkova on Friday.

Third seed Radwanska joined reigning champion Serena Williams and Australian Open champion Li Na to become the latest causality in the women's draw, after being knocked out in the third round by Croatia's Ajla Tomljanovic 6-4, 6-4.

Tomljanovic used an array of shots against her higher-ranked opponent and registered her first top 10 victory. The Croat broke Radwanska's serve twice in the first set and built a 5-1 lead, and though the Pole got a break back and made it 5-4, Tomljanovic wrapped up the set in 37 minutes.

The 21-year-old carried the momentum into the second set and got an early break. She staved off three break points and never looked under pressure to seal the straight-set victory in one hour and 21 minutes.

"After seeing, you know, the two first seeds go out, you kind of feel like I can do this, too," Tomljanovic said. "I grew up with these girls that are beating them."

"You go out I went on the stadium for the first time, and she kind of feels like home there, because she's been there a lot more than I did. I went out there, and I really thought I could win. I think that showed and it is why I won."

19th seed Stosur produced the second upset of the day by defeating Australian Open finalist Cibulkova 6-4, 6-4 at Court Suzanne Lenglen in one hour and 40 minutes. Stosur maintained her unbeaten run over the ninth seed Slovak, and advanced into the fourth round of a major event for the first time since 2012 US Open.

The Australian troubled Cibulkova with her heavy topspin and big forehand and, despite losing the early break advantage, Stosur clinched the first set in little over 45 minutes. Cibulkova displayed fighting spirit in the second set to keep her hopes alive but Stosur broke her serve in the seventh game and went on to clinch the set.

Stosur committed just 12 unforced errors, compared to Cibulkova's 35, and racked up 10 aces in the match. The Australian could face Maria Sharapova in the fourth round.

"It's very pleasing. I'm really happy with the way I played today and I think it's the first time I won three matches in a row for a while, too," Stosur said. "And to keep playing well, you know, when your opponent is putting you under pressure at certain times in the match, it's really amazing to come out of those as well.

"I just love playing here. I've had some really great moments here and some of the best matches of my career actually. Hopefully I can still have a few more matches like this."