"I am feeling much better, I mean I did a check after my match in Madrid and I'm lucky it's not too bad, it's just a muscle strain," she was quoted as saying on the WTA Insider Twitter feed on Monday.
"I've had a lot of treatments. I arrived last night, practised this morning and feeling good."
The 29-year-old Kerber, who returned to the top of the rankings ahead of the pregnant Serena Williams, will be one of the main favourites to win in Paris.
Her previous best run at the claycourt slam was a quarter-final appearance in 2012.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
(Reporting by Martyn Herman; editing by Mark Heinrich)
