Djokovic beats Wu Yibing in tough Wimbledon opener, admits he wasn't freshest

Novak Djokovic defeated China's Wu Yibing in a hard-fought first-round match at Wimbledon, continuing his bid for a record-breaking 25th Grand Slam title. The Serbian star admitted after the match that he was happy with the win but did not feel at his freshest. The match proved more challenging than expected.