Novak Djokovic has admitted he is ‘not really satisfied’ with his performance against qualifier Jaume Munar in the French Open. The former champion, 31, posted a straight-sets win against the Spaniard, 21, to reach the third round of the Grand Slam, but was quick to point out that he needs to improve. Speaking after the match he said: ‘I feel like I need to go back to those days when I started playing tennis.’ Djokovic, who underwent right elbow surgery earlier this year, is the No 20 seed in Paris, his lowest Grand Slam seeding since the 2006 US Open