The 94th-ranked Pole converted all six of her break points and will next face either fifth-seeded Elina Svitolina or Tsvetana Pironkova.
Still grieving the recent death of his father, 25th-seeded American Steve Johnson dropped to his knees and began crying at the end of his 6-2, 7-6 (8), 3-6, 7-6 (6) victory over Borna Coric at the French Open. Playing close to the lines, she got back into her stride and took the decider in 32 minutes on the first of two match points.
Madison Keys ended a four-match losing streak by winning on clay for the first time this year, beating Ashleigh Barty 6-3, 6-2 at the French Open.
The fourth-seeded Muguruza was made to work hard for more than two hours on the Philippe Chatrier show court before rallying past 53rd-ranked Anett Kontaveit 6-7 (4), 6-4, 6-2. She knocked off No. 27 Yulia Puntintseva in straight sets, 7-5, 6-2 to advance to the fourth round of the tournament.
The 29th-seeded del Potro, the 2009 U.S. Open champion, was having his own physical problems, slowed by a bothersome upper right leg.
31 de mayo de 2017, 13:26París, May 31 (Prensa Latina) Rafael Nadal looked in ominous form as he dispatched Robin Haase 6-1, 6-4, 6-3 and moved into the third round of the French Open.
Jo-Wilfried Tsonga's first round match at the French Open had been suspended because of darkness with the 12th-seeded Frenchman seemingly on the brink of an early exit.More news: Putin put on the spot over Russia and Trump
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The road will not get any easier at the 2017 French Open.
They will be on full display in the next two weeks as the Parisian Grand Slam has kicked off this past Sunday.
- Australia's Nick Kyrgios beat Germany's Philipp Kohlschreiber 6-3 7-6 (4) 6-3 in the first round. Muguruza needed three sets to beat Kontaveit, but she got her win, 6-7 (4), 6-4, 6-2. The Ukrainian has won three other tournaments this year.
Mattek-Sands, who is back in the third round for the first time since 2013, will next face Samantha Stosur. She has said she will return to the tour in 2018.
After becoming No. 1 previous year, Andy Murray has been struggling in 2017, but he'll try to right himself starting in the French Open's first round against Andrey Kuznetsov on Tuesday.
- Unseeded Hsieh Su-wei of Taiwan beat women's seventh seed Johanna Konta of Britain 1-6 7-6 (2) 6-4 in the first round.