Britain's Andy Murray produced one of his best performances in recent years to hold off Italian 13th seed Matteo Berrettini and win a five-set thriller in the Australian Open first round.
Murray, who thought hip surgery in 2019 would end his career, saved a match point at 5-4 in the decider.
Dan Evans is also through after beating Argentina's Facundo Bagnis.
Evans, seeded 25th, won 6-4 4-6 6-4 6-4 in a first-round match that was delayed for three hours because of extreme heat in Melbourne.
Former world number one Murray later ensured four Britons would play in the second round - after Emma Raducanu and Cameron Norrie won on Monday - with a memorable victory over last year's semi-finalist Berrettini.