World number 10 Tommy Haas of Germany has pulled out of this month's French Open due to a persistent shoulder problem, German sports news agency SID reported on Tuesday.
Haas, a semi-finalist at this year's Australian Open and a former world number two, may also miss the grasscourt tournament at Halle, Germany and the Wimbledon grand slam event, SID said.
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The French Open begins at Roland Garros in Paris on May 27.
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