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. “I can tell you that I enjoyed myself really, really much today,” said Djokovic afterwards. “I can tell you that pain-free tennis is the best tennis. I was pain-free and I’m really glad. It was a great test obviously against one of the best players in the world.