World number one Ashleigh Barty retired with injury from her second-round match against Magda Linette at the French Open.
Barty, 25, left the court for a medical time-out before retiring at 2-2 in the second set.
World number 45 Linette - who had never beaten a top 10 player - faces Tunisian world number 26 Ons Jabeur next.
More to follow.