Eighth-ranked Belinda Bencic of Switzerland has pulled out of the French Open after dealing with a back injury since March.
Bencic's withdrawal was announced by the clay-court Grand Slam tournament on Tuesday.
She will be replaced in the main draw by Lauren Davis of the United States.
Bencic has not won a match since beating, coincidentally, Davis at Indian Wells, Calif., two months ago. Since then, Bencic has lost three times in a row and missed events, including the Fed Cup.
The draw for the French Open is Friday. Play begins Sunday.