After playing nearly four hours to beat Sara Sorribes Tormo in the fourth round, Haddad Maia won only one service game in the first set. But she saved the only two break points she faced in the second set — both in the 11th game to go up 6-5 — and won the tiebreaker.
The 27-year-old Brazilian started the deciding set with a double break and a 3-0 lead. A frustrated Jabeur flipped her racket in the air after sending an easy backhand wide on a break-point opportunity while down 4-1. Haddad Maia won the game and served out the match.
Haddad Maia, who in 2019 was provisionally suspended for failing a doping test, is the first Brazilian woman to reach the semifinals at Roland Garros in the Open era. Maria Bueno reached the last four at the 1966 French Open and made the 1968 US Open semifinals.
Haddad Maia’s fourth-round win over Sorribes Tormo, 6-7 (3), 6-3, 7-5, was the longest WTA match of the year, clocking in at 3 hours, 51 minutes. She has dropped the first set in her past three matches and has played three sets in all but her first-round victory. Entering the French Open, Haddad Maia was 1-11 in Grand Slams when losing the first set.
Jabeur, who was the runner-up at Wimbledon and the US Open last year, has been trying to become the first African woman to win a singles Grand Slam title.
The top-seeded Swiatek and sixth-seeded Gauff were up next on Chatrier in a rematch of last year’s French Open final won by Swiatek in straight sets. The 22-year-old Swiatek has been ranked No. 1 for more than a year.
The Associated Press contributed to this report.
Beatriz Haddad Maia upsets Ons Jabeur to reach French semis