"He's just playing on such a high level right now," Djokovic said ahead of his mind-blowing 55th grand slam semi-final and 13th in Australia. Hopefully I can deliver my A-game because that's what's going to be needed at least to have a chance." But he bristled when asked if he felt like he was playing catch-up against Sinner and Alcaraz, the two dominant forces in tennis these days. These kind of rivalries and the contrast of the personalities and the styles of play are very good for tennis. "The level he's still playing, he is, I think, the most professional athlete we have here in the locker room.