Iga Swiatek powered into the French Open semi-finals on Wednesday as a comfortable victory over American Jessica Pegula extended the world number one's winning streak to 33 matches. The Polish star cruised to a 6-3, 6-2 win on Court Philippe Chatrier to set up a last-four meeting with Daria Kasatkina on Thursday. Swiatek will equal Venus Williams' record for the longest unbeaten run for a women's player in the 21st century if she wins a second Roland Garros title this week. But she said she still feels nervous before big matches despite appearing in almost unbeatable form.