Wimbledon 2015: Don’t cross Novak Djokovic – or you’ll have his dad to answer to

A supportive father is something everybody wishes to have. But sometimes even the best of them can take matters too far. Srdjan Djokovic is known to be not just the proud father of the defending champion Novak Djokovic but a proud Serbian too, and his nationalism is most often on show through the prism of his son’s exceptional tennis.