And so the upsets continue.
With the top two seeds in the women's draw, Serena Williams and Li Na, already knocked out of the French Open, No. 3 Agnieszka Radwanska of Poland seemed to be in a great position. But she was not immune to an upset either, losing to unseeded Croatian Ajla Tomljanovic in straight sets 6-4, 6-4.
Radwanska never quite looked comfortable against the 21-year-old, though she conceded that her opponent played well, telling Piers Newbery of BBC Sport:
She definitely played good tennis today. I had my chances, I didn't take them. I think that cost me the match.
It doesn't mean if the first and second seeds lost, it doesn't mean the third one is going to win.
It's stupid to say that. It doesn't matter who is in the draw, if you play good then you're going to win. I just didn't play good enough today to win the match.
While Radwanska will surely look back and wish she had played better, it was Tomljanovic who had more unforced errors, 29 to 22. She also had six double faults, so she was not without her flaws in this match, though of the 38 first serves she managed to keep in play (just a 57 percent rate), she won 30 of them.
So yes, Tomljanovic's win was surprising on a number of fronts, as WTA.com noted:
Before this week, Tomljanovic had only beaten one Top 30 player and had never been beyond the second round of a major. Yet she looked comfortable from the outset, racing into a 5-1 lead before eventually closing out the first set.
Radwanska was broken again at the start of the second and saw a chance to break back pass her by in the eighth game as Tomljanovic calmly punched away a volley. This would be as close as she would come and a few games later the Croat served out for a place in the fourth round.
Tomljanovic's victory means that for the first time in the Open Era the Top 3 seeds have all lost before the fourth round in a major.
It was her ability to use a strong serve that kept Radwanska off-balance and her capacity to handle Radwanska's serve that gave her a big edge. The 25-year-old never looked right, and the Roland Garros clay continues to confound her.
Radwanska wasn't the only player upset on the day, as No. 9 Dominika Cibulkova of Slovakia was knocked out of the tournament by Australian No. 19 Samantha Stosur. That wasn't as surprising a victory as Tomljanovic's, however; Stosur is now 5-0 all time against Cibulkova.
As for the rest of the field, the French Open couldn't be more wide-open.
No. 4 Simona Halep is now the top remaining seed, though No. 7 Maria Sharapova, who won this tournament in 2012, will likely be considered the favorite. No. 11 Ana Ivanovic is worth watching—she won the event in 2008—while players like No. 5 Petra Kvitova and No. 6 Jelena Jankovic will like their chances.
Keep in mind that when Na and Williams lost, they didn't just represent the last two Grand Slam winners, they were also two of the last three women to win the French Open.
But perhaps it should come as no surprise that the field is so wide-open. In the last seven years, seven different women have won this event. With the top three players now out, that trend may continue.
Up next for Tomljanovic is 25-year-old No. 14 seed Carla Suarez Navarro of Spain, who took out American Taylor Townsend 6-2, 6-2.