John Isner made a big claim about Novak Djokovic on Sunday in Madrid. The world no. 9 made an intriguing comparison between the Serbian and the rest of players, saying something interesting. 'I think that Djokovic will be back at the level he had before injuries.
He is the best player that I saw playing at the maximum of his abilities when he is at the top,' the American player said. He also praised Rafael Nadal: 'I never won against Rafa and he seems a difficult player for me to beat.
He has no weaknesses playing like now. He is a lefty, very powerful and always competes at the maximum until the end in all the matches.' Source: Mundo Deportivo ALSO READ: Roger Federer announces surprising comeback - Here is where