Could I ask who's calling? does differin remove acne scars âHe had many injuries on this surface, but now he looks fit,â Djokovic said. âNo doubt heâs the best player in the moment this year, no question about it. Heâs been playing very confident, but, you know, I know how to play him. Hard court is the surface that is my most successful surface. I know what I need to do.â