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Associated Press
Switzerland's Martina Hingis smiles after her game against Poland's Agnieszka Radwanska during their Fed Cup World Group Playoff tennis match between Poland and Switzerland, in Zielona Gora, Poland, Saturday, April 18, 2015.   Five-time Grand Slam champion Martina Hingis  played  her first competitive singles match since 2007. (AP Photo/Alik Keplicz)

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