Paris - Ukrainian ninth seed Elina Svitolina received a walkover into the French Open last 32 on Wednesday as compatriot Kateryna Kozlova withdrew from the tournament before their scheduled second-round match.
World number 67 Kozlova suffered a rib injury, leaving her childhood friend Svitolina as the first player to reach round three.
Svitolina, a two-time Grand Slam quarter-finalist, will next face either 2016 champion Garbine Muguruza or Sweden's Johanna Larsson for a place in the second week.
Results from the fourth day of the French Open on Wednesday (x denotes seeding):
Men
Second round
Stefanos Tsitsipas (GRE x6) bt Hugo Dellien (BOL) 4-6, 6-0, 6-3, 7-5
Corentin Moutet (FRA) bt Guido Pella (ARG x19) 6-3, 6-1, 2-6, 7-5
David Goffin (BEL x27) bt Miomir Kecmanovic (SRB) 6-2, 6-4, 6-3
Rafael Nadal (ESP x2) bt Yannick Maden (GER) 6-1, 6-2, 6-4
Women
Second round
Sloane Stephens (USA x7) bt Sara Sorribes Tormo (ESP) 6-1, 7-6 (7/3)
Polona Hercog (SLO) bt Jennifer Brady (USA) 6-3, 6-7 (8/10), 6-4
Garbine Muguruza (ESP x19) bt Johanna Larsson (SWE) 6-4, 6-1
Elina Svitolina (UKR x9) bt Kateryna Kozlova (UKR) - walkover
Elise Mertens (BEL x20) bt Diane Parry (FRA) 6-1, 6-3
Veronika Kudermetova (RUS) bt Zarina Diyas (KAZ) 7-5, 6-1
Kaia Kanepi (EST) bt Shuai Zhang (CHN) 6-7 (4/7), 6-0, 7-5