An all-Russian affair and a tussle between two former Roland Garros finalists highlights the action on Day 6. We preview the key third-round matchups at WTATennis.com.

Friday, Third Round

Samantha Stosur (AUS #24) vs. [11] Lucie Safarova (CZE #13)
Head-to-head: Safarova leads, 11-3
Key Stat: Stosur owns 2-6 record vs. Top 20 players in 2016.

Two former finalists that sauntered into Roland Garros with low expectations and fitness issues suddenly find themselves with a golden opportunity to reach the round of 16. Lucie Safarova’s bacterial infection and reactive arthritis issues have been well-documented, but the Czech has steadily improved her health in the last few months and is now starting to resemble her peak form here in Paris. Last year’s runner-up has dropped just six games in two rounds and says she’s feeling better each day. “I’m taking it step by step, really just enjoying the moment and of course trying to reach the best result,” she said on Wednesday after storming past Viktorija Golubic. Stosur came to Paris with a serious left wrist injury but the Aussie has acquitted herself quite well without full use of her two-handed backhand. Health issues aside, the matchup is not a favorable one for Stosur. Her eleven losses to the Czech have left her shaking her head numerous times in the past. “It’s a tough match-up,” Stosur said. “She’s probably the person I’ve played the most in my career and she’s never easy to beat. I know that.”

Pick: Safarova in three

[2] Agnieszka Radwanska (POL #2) vs. [30] Barbora Strycova (CZE #33)
Head-to-head: Radwanska leads, 4-0
Key Stat: Strycova has a 2-12 lifetime record against Top 10 players at Grand Slams.

So far, so good for Agnieszka Radwanska at Roland Garros. The World No.2 made the unconventional decision to skip Rome in order to practice on the clay at home and the decision is paying dividends. Having won all four sets she’s contested, Radwanska will next face a player that she’s owned in the past for a spot in the second week. But that player, the ever crafty and pugnacious Barbora Strycova, is not one to be taken lightly. The 30-year-old has produced 22 wins this season, including a giant upset of Garbiñe Muguruza at the Australian Open. “She’s playing great tennis, especially on clay,” Radwanska said of the Czech. “For sure another tough match. I’m healthy, in one piece, and I’m just ready for the next one.”

Pick: Radwanska in three

[13] Svetlana Kuznetsova (RUS #15) vs. [24] Anastasia Pavlyuchenkova (RUS #27)
Head-to-head: Kuznetsova leads, 4-1
Key Stat: Kuznetsova is contesting the third round at a major for the first time since the 2014 French Open.

Suddenly surging Svetlana Kuznetsova has labelled herself a “black horse” (think dark horse, but a little more menacing) at this year’s French Open. Will the pedigreed Russian gallop into the second week? To do it she’ll have to get by compatriot Anastasia Pavlyuchenkova, who is playing in the third round at a major for the first time in over three years. Kuznetsova holds the significant edge in the pair’s head-to-head, and she possesses the far more impressive clay pedigree, having won Roland Garros and reached the quarterfinals or better seven times, so it’s a very tall order for the World No.27. But Pavlyuchenkova is a world-class ball striker and a former Roland Garros quarterfinalist who is no doubt eager for the chance to demonstrate that she has what it takes to make another deep run at a major.

Pick: Kuznetsova in three

[6] Simona Halep (ROU #6) vs. Naomi Osaka (JPN #101)
Head-to-head: First meeting
Key Stat: Halep has lost four times to players ranked outside of the Top 100 at majors, including this year’s Australian Open.

Simona Halep just wants to put her head down and march through her matches one point at a time. It’s a constant theme in her pressers, and a constant challenge for her on court. Can she deflect the pressure of being a former finalist in Paris so that she may focus on dismantling the game of a talented yet unproven Naomi Osaka in round three? “I just want to do my job here,” Halep said after her second round victory over Zarina Diyas. “I had two good matches here already. I’m looking forward to play the third one.” Halep struggled at times with consistency in defeating Diyas, and this year’s Madrid champion knows that she’ll have to be at her best to take down the dangerous 18-year-old from Japan. “I expect a tough one,” she said. “She’s a young player and she has nothing to lose. It’s going to be good match, and hopefully I will win it. I’m here to win.”

Pick: Halep in two

Around the Grounds: Alizé Cornet and Tatjana Maria had heated words after their three-set thriller on Day 5. On Day 6 they’ll stand across from one another on the doubles court as Cornet and Magda Linette take on Maria and Madison Brengle on Court 4. Popcorn will be essential. American Sloane Stephens will bid to reach the second week at Roland Garros for the fifth consecutive year when she meets Tsvetana Pironkova on Court 1. No.4 seed Garbiñe Muguruza (vs. Wickmayer) and No.10 seed Petra Kvitova (vs. Rogers) will also be looking to reach the second week.

By the Numbers:

5-1 – Garbiñe Muguruza’s record in third-round matches at majors, but the Spaniard lost her last one in Australia to Barbora Strycova.

6 – Number of former Grand Slam champions to reach the third round at Roland Garros this year (Kvitova, Ivanovic, Kuznetsova, Stosur, Serena Williams and Venus Williams).

-Chris Oddo, wtatennis.com contributor