PARIS — Iga Swiatek eliminated Coco Gauff 6-2, 6-4 in the French Open semifinals Thursday and stretched her winning streak at Roland Garros to 20 matches.

The top-ranked Swiatek is trying to earn her fourth championship in five years in Paris and can become the first woman with three in a row here since Justine Henin from 2007-09.

Swiatek improved to 11-1 overall against No. 3 seed Gauff, the reigning U.S. Open champion, and has defeated her at the clay-court Grand Slam tournament…