Elena Rybakina held off Veronika Erjavec to reach the second round of the French Open, with Elina Svitolina also progressing after a scare.
Linda Noskova booked her place in the Madrid Open quarter-finals with victory over Coco Gauff, while Mirra Andreeva also progressed.
Iga Swiatek made an impressive start at the Madrid Open, defeating Daria Snigur in just over an hour in the Spanish capital.
Madison Keys has reached the quarter-finals of the Charleston Open for the sixth time, while Iva Jovic will join her in the last eight.
No matches available.