He dropped a set to Sock. Regardless, his level was great, he has the right potential but starting to look on edge here for whatever reason. His QF match brought my hopes of Zverev beating and even challenging Djokovic down.
Zverev certainly CAN win it, we all know he has the game...it is more about what is between the ears and he has quite a potential tough path. If he gets past Nole, how much mentally and emotionally will ge have left for the final, especially against Medvedev.
He already won the Olympics which is even bigger for him. He repeated this in an interview before the US Open when he talked about last year's final and was asked if he would exchange that win or a win of this year's US Open for his Olympic gold medal. He laughed and said: "Zero chance, obviously."