Simona Halep battled back after losing the first set to beat Angelique Kerber and set up a semi-final against Garbine Muguruza.
Garbine Muguruza advanced to the French Open semi-final for the second time in her career by hammering two-time champion Maria Sharapova.
Angelique Kerber set up a quarter-final against Halep at the 2018 French Open by hammering Caroline Garcia 6-2 6-3.
Caroline Wozniacki looked to be in danger of losing to Daria Kasatkina when bad light forced play to be suspended.
Simona Halep talked about opponents raising their level against her, Petkovic's injury and an unfamiliar court.
Maria Sharapova hammered Karolina Pliskova at the 2018 French Open and may now face Serena Williams in the Last 16.
Elina Svitolina suffered a shock loss at the hands of Mihaela Buzarnescu at Roland Garros.
Madison Keys progressed to the fourth round of the French Open for the second time by beating Naomi Osaka in straight sets.
Maria Sharapova talked about the best things about being a tennis player, as well as the challenges of facing a fearless new generation.
Maria Sharapova edged past Donna Vekic 7-5 6-4 in a high-quality match and will now play Karolina Pliskova in round three.
Kei Nishikori overcame a difficult challenge to beat Benoit Paire in five sets and book his place in round three at Roland Garros.
Naomi Osaka talked about how comfortable she is at Grand Slams, her routine changes due to fame and her upcoming clash with Keys.
Simona Halep emerged victorious from a tricky encounter with Alison Riske as she won 2-6 6-1 6-1 after losing the opening set.
Caroline Wozniacki booked her place in the second round of French Open 2018 with a comfortable 7-6 6-1 win over Danielle Collins.
Jelena Ostapenko surrendered her French Open title at the first hurdle as she was stunned by Kateryna Kozlova in her opening match.
Elina Svitolina thrashed Simona Halep 6-0 6-4 to win the Italian Open for the second successive year and remain World No.4.
Caroline Wozniacki came through a tough test as she beat Anastasija Sevastova 6-2 5-7 6-3 to set up a quarter-final with Anett Kontaveit.
Maria Sharapova fought back from a set down to beat Dominika Cibulkova 3-6 6-4 6-2 and book a third round meeting with Daria Gavrilova.
Karolina Pliskova loses 3-6 6-3 7-5 to Maria Sakkari in a huge upset in the second round of the Italian Open, while Halep thrashes Osaka.
Maria Sharapova maintained the form she found in Madrid with an encouraging three-set win over talented Australian Ashleigh Barty.