Novak Djokovic beat young rival Carlos Alcaraz 4-6 6-4 6-3 6-4 in a gladiatorial battle worthy of a title clash to charge into the Australian Open semi-finals on Tuesday and remain in the hunt for a record 25th Grand Slam title.

More remarkably: Djokovic has now advanced to his fiftieth major semifinal, after beating Alcaraz in a grueling four-set match that went to about 1:00 am local time in Melbourne. That number sets yet another Djokovic record in men’s tennis, further cementing the athlete’s legendary status.