
Aryna Sabalenka and Coco Gauff hold the top two spots after their run to the final in Paris where American Gauff defeated world No 1 Sabalenka in three sets.
Boisson received a wildcard entry a year after undergoing surgery on her left knee, playing her first Grand Slam ranked 361th in the world.
The 22-year-old beat world No 3 Jessica Pegula and sixth ranked Mirra Andreeva before falling to Gauff in the semi-finals.
Iga Swiatek, the defending three-time French Open champion, falls two places to seventh after her semi-final defeat to Sabalenka.
China’s Zheng Qinwen moves up to fifth after reaching the quarter-finals in Paris where she won Olympic gold last year.