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.

The Pakistan Cricket Board (PCB) has relocated February's tri-nation One-Day International (ODI) series with New Zealand and South Africa from Multan to Lahore and Karachi, two cities set to host the Champions Trophy later in the month.

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.

Nick Kyrgios faces another injury setback in his planned return to Grand Slam tennis at the Australian Open after an abdominal strain forced him to withdraw from an exhibition with Novak Djokovic this week.