No.14 seed Madison Keys has made at least the fourth round of six of the past seven majors; since the American's debut in a Grand Slam second week at the 2015 Australian Open (where she reached the semifinals), Keys has progressed to this stage 12 times out of 16 Slams entered. Since the 2017 US Open, where she reached the final, Keys has an 82% winning percentage (28-6) in Grand Slams - but just a 55% winning percentage (18-15) over the same period in non-Slam events.

Defending doubles champion Katerina Siniakova's upset of Naomi Osaka meant that the Czech became the first current doubles World No.1 to defeat the singles World No.1 since Martina Navratilova beat Stefanie Graf 7-6(4), 6-1 in the 1987 US Open final.

No.8 seed Ashleigh Barty has played Sofia Kenin twice, and is yet to drop a set to the American. Barty triumphed 6-3, 6-2 on green clay in the first round of Charleston last year and 6-1, 7-6(2) in Fed Cup first-round action this February on indoor hard courts.

Defending champion Simona Halep will be just the second Top 20 opponent Iga Swiatek has faced in her career. The first was No.16 seed Wang Qiang in the second round - and the Polish teenager won in a 6-3, 6-0 rout.

Roland Garros 2019 marks the first time that Aliona Bolsova has competed in a Grand Slam main draw - and just her third WTA-level main draw, having made her WTA debut at Charleston in April, where she reached the second round. The Spaniard has become the first Grand Slam debutante to reach the fourth round at a major since Jennifer Brady at the 2017 Australian Open, and is now bidding to become the first player to reach the quarterfinals on her Grand Slam debut since compatriot Carla Suárez Navarro's run to the last eight at Roland Garros 2008 - and also the first qualifier to reach the last eight in Paris since Yaroslava Shvedova in 2012. Prior to Roland Garros, Bolsova had only one Top 100 scalp under her belt; this week, she has added three.

Four players in action today have won a WTA Tour title in 2019: Ashleigh Barty in Miami, Madison Keys in Charleston, Sofia Kenin in Hobart and Amanda Anisimova in Bogota. In addition, Simona Halep was runner-up in Doha and Madrid, while Iga Swiatek was the Lugano finalist. Anisimova and Istanbul champion Petra Martic are the only remaining 2019 red clay champions in the draw.

Katerina Siniakova, Sofia Kenin, Iga Swiatek, Amanda Anisimova and Aliona Bolsova are all seeking to make their maiden Grand Slam quarterfinal today; only Anisimova has reached the fourth round of a major before, at the Australian Open in January.

This time last year, Iga Swiatek was ranked World No.344 and playing the Roland Garros junior events - eventually lifting the girls' doubles trophy, partnering Catherine McNally. The Pole is one of four former girls' doubles champions still in the draw, along with Sloane Stephens (the 2010 winner with Timea Babos), Katerina Siniakova (the 2013 winner with Barbora Krejcikova) and Marketa Vondrousova (the 2015 winner with Miriam Kolodziejova). The only remaining former girls singles champion is 2008 victor Simona Halep.

17-year-old Amanda Anisimova and 18-year-old Iga Swiatek are both bidding to join 19-year-old Marketa Vondrousova as teenage representatives in the quarterfinals. The last time there were two or more teenagers in the last eight of a major was at the 2009 US Open (17-year-old Melanie Oudin and 19-year-olds Caroline Wozniacki and Yanina Wickmayer); the last time two teenagers made the quarterfinals of Roland Garros was also 2009 (19-year-olds Victoria Azarenka and Sorana Cirstea), and the last time three or more teenagers reached the last eight in Paris was 2001 (17-year-olds Kim Clijsters and Lina Krasnoroutskaya, 18-year-old Justine Henin and 19-year-old Serena Williams).



For full order of play, visit rolandgarros.com.


Get to know the newest face in the last 16, Spanish qualifier Aliona Bolsova, in Stephanie Livaudais' exclusive interview for wtatennis.com.

Roland Garros debutante Iga Swiatek sat down with WTA Insider Courtney Nguyen for an exclusive Q&A after her third-round win over Monica Puig.

Serena Williams and Naomi Osaka have become known for turning matches around through sheer willpower - but that wasn't enough in their shock upsets on Saturday, writes Bonnie D. Ford for ESPN.com.