"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.
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Her previous best run at the claycourt slam was a quarter-final appearance in 2012.
(Reporting by Martyn Herman; editing by Mark Heinrich)
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