Juan Martin Del Potro of Argentina reacts after winning his Men's singles match against Grega Zemlja of Slovenia at the All England Lawn Tennis Championships in Wimbledon, London, Saturday, June 29, 2013. (AP Photo/Kirsty Wigglesworth)

LONDON (AP) — Former U.S. Open champion Juan Martin del Potro says he needs to consult a doctor after injuring his left knee and ankle during a third-round victory at Wimbledon.

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