Coco Gauff ended the run of French wildcard Lois Boisson to book a Roland Garros final against World No 1 Aryna Sabalenka.
Gauff, World No 2, produced a ruthless performance to defeat Boisson, a player ranked some 300 places below her but who had beaten back-to-back top-10 opponents to reach the semi-finals on her grand slam debut.