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Spain's Rafael Nadal (C) watches as teammate Marc Lopez plays against India's Sumit Nagal during their Davis Cup singles tennis match

Spain's Rafael Nadal (C) watches as teammate Marc Lopez plays against India's Sumit Nagal during their Davis Cup singles tennis match (AFP Photo/Sajjad Hussain)

Tennis star Rafael Nadal

Rafael Nadal pulled out of the London Olympics on Thursday due to injury.