Novak Djokovic is once again red-hot favourite at the Australian Open as he chases an unprecedented 25th Grand Slam title, but a wrist problem and the emergence of Carlos Alcaraz puts his all-conquering reign under threat. The 36-year-old from Serbia defeated Stefanos Tsitsipas in last year's final for a record-extending 10th Melbourne crown then added the French and US Open titles to his collection in 2023. But he lost a pulsating Wimbledon final to Alcaraz, who is a different player to the one that last graced the Australian hard courts as an 18-year-old ranked outside the top 30.