![PHOTOS: Novak Djokovic warms up with son Stefan before Wimbledon match](https://images.tennis.com/image/private/t_16-9_768/f_auto/tenniscom-prd/tvsqhfmvfqfynupg7bzi.jpg)
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PHOTOS: Novak Djokovic warms up with son Stefan before Wimbledon match
The nine-year-old apparently did a great job in getting dad ready for action, as Djokovic went on to win against British wildcard Jacob Fearnley in four sets on Centre Court.