FRANKFURT, Germany (AP) - Steffi Graf has been forced to cancel her farewell tour in Germany because of a knee injury, her management office said Friday.
Four exhibitions slated for March in Graf's homeland have been called off, as well as planned matches in Warsaw, Poland, and Qatar.
Graf, winner of 22 Grand Slam titles, retired last summer. She has been playing occasional exhibitions as part of a world farewell tour.
A South American tour planned for February also had to be called off because of Graf's injury.
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