Paris--Ana Ivanovic made the French Open quarter-finals for the first time since her 2008 title run Sunday where she'll face Elina Svitolina, the first Ukrainian to make the last eight.
But defending champion Maria Sharapova's scheduled last-16 clash against Lucie Safarova was pushed back until Monday after rain caused a lengthy stoppage at a chilly Roland Garros.
The Russian second seed now faces the prospect of playing matches on two successive days with the first two women's quarter-finals already programmed for Tuesday.
Seventh-seeded Serb Ivanovic defeated Russian ninth seed Ekaterina Makarova, a semi-finalist at the Australian Open in January, 7-5, 3-6, 6-1 to book her eighth career Grand Slam quarter-final.
Watched again by German World Cup winning football star Bastian Schweinsteiger, the 27-year-old Ivanovic shrugged off a two and a half hour rain stoppage to secure her third three-set win in four rounds in Paris.
The 20-year-old Svitolina beat fellow former Roland Garros junior champion Alize Cornet on a windy, chilly Court Philippe Chatrier 6-2, 7-6 (11/9).
"It's amazing to be in the quarter-finals again. To be honest, coming into the tournament I didn't really expect that at all," said Ivanovic.
"But I really worked hard for each match. I worked hard even before the tournament to reach the quarter-final again."
Svitolina, seeded 19, is only the second Ukrainian woman to reach a Grand Slam quarter-final after Kateryna Bondarenko made the last eight at the 2009 US Open.
It was Svitolina's first win over Cornet in three meetings and the result ended French hopes in the women's singles for another year.
She displayed nerves of steel to achieve victory, failing to serve out the tie in the 10th game of the second set and then allowing five match points to slip through her fingers.
AFP