FILE PHOTO: Tennis - WTA Premier - Aegon International - Eastbourne, Britain - July 1, 2017 Serbia's Novak Djokovic in action during the final against France's Gael Monfils Action Images via Reuters/Matthew Childs
LONDON (Reuters) - A lot can happen in 12 months. Just ask Novak Djokovic who came into last year's Wimbledon as holder of all four grand slam titles but has since relinquished his grip on the men's game in spectacular fashion.
The Serb, who begins his campaign for a fourth Wimbledon title against Slovakian Martin Klizan on Centre Court, has not lifted a grand slam trophy since last year's French Open.
