Karolina Pliskova overcame a spirited challenge from world number 172 Mayar Sherif, the first Egyptian woman to play the main draw at a Grand Slam, to reach the French Open second round. Second seed Pliskova, a semi-finalist in 2017, squandered eight set points in Tuesday's opening set as Sherif took a shock lead but the Czech recovered to progress 6-7 (9/11), 6-2, 6-4. Pliskova will face 2017 champion Jelena Ostapenko for a place in the last 32. mw/dj