Novak Djokovic proclaimed himself "pain free" after defeating Daniil Medvedev in an exhibition match on Friday ahead of Wimbledon. Former world number one Djokovic, the seven-time Wimbledon champion, needed surgery earlier this month following a serious knee injury at the French Open. But on Friday the 37-year-old took his place in the draw for Wimbledon, which starts on Monday, with Djokovic, seeded two, taking on 123rd-ranked Vit Kopriv of the Czech Republic at the grass-court Grand Slam. Djokovic's movement was not completely smooth in a 6-3, 6-4 win over Medvedev during an exhibition event at London's Hurlingham Club, with the Serbian's right knee strapped up. But he struck the ball crisply and served well.