Novak Djokovic returns to the scene of his greatest triumphs this week at the Australian Open, adamant he is ready and able to see off the challenge from Jannik Sinner and Carlos Alcaraz in his pursuit of a record 25th Grand Slam crown.

As Andy Murray joins Novak Djokovic as his coach for the Australian Open, BBC Sport takes a look at the defining moments of their great rivalry.

Novak Djokovic is targeting an 11th Australian Open title and record 25th Grand Slam crown but faces an uphill battle against Jannik Sinner and Carlos Alcaraz. - Carlos Alcaraz - Still just 21, the Spaniard already owns four Grand Slam titles -- including the French Open and Wimbledon last year -- since bursting on the scene with victory at the US Open in 2022.

If Novak Djokovic Wins Australian Open, Andy Murray Would Be ‘Flooded With Coaching Requests,’ John McEnroe Says

Andy Murray retired from tennis last year due to repeated injury problems and the three-time Grand Slam champion has since teamed up with former rival Novak Djokovic as his coach

Novak Djokovic and new coach Andy Murray have been seen practising together for the first time ahead of the start of the Australian Open on Sunday.

Nick Kyrgios’ planned return to Grand Slam tennis at the Australian Open is in doubt after he sustained an abdominal injury and was forced to withdraw from an exhibition with Novak Djokovic this week.

Nick Kyrgios says he is doing all he can to be fit for the Australian Open after withdrawing from an exhibition match with an abdominal strain.