LEARNING

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.