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I won't stop trying!' - Juan Martin del Potro confirms further knee surgery - TennisBuzz - Breaking tennis news, live scores and features
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Huge shock or cheeky bluff? Juan Martin Del Potro 'a serious doubt' for final rubber against Britain - Eurosport
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File:Juan Martin del Potro against Novak Djokovic at the 2008 Tennis Masters Cup.jpg - Wikimedia Commons
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