Wimbledon 2013: 'Tired' Philipp Kohlschreiber walks off court

Philipp Kohlschreiber quits his first-round match against Croatia's Ivan Dodig at Wimbledon, saying he is "tired."

It was later revealed the German was suffering the effects of flu and felt unable to continue.

The match was tied at two sets all when Dodig broke the German's serve, only for Kohlschreiber to retire immediately and walk off Court 18.

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