“Are [Sinner and Carlos Alcaraz] better right now than me and all the other guys? I’m going to fight until the last shot, until the last point, and do my very best to challenge them.”This match-up will mark Djokovic’s fifth consecutive grand slam semi-final, a remarkable development at 38. But this year Djokovic has spent only nine hours and seven minutes on court while playing 11 completed sets. It is difficult to remember another time when Djokovic entered a big match as such a heavy underdog. However, he will still have to produce a quality match against an in-form Zverev who has performed at a high level during the tournament.