Novak Djokovic has credited Andy Murray with "bringing a fresh look" to his game as he prepares for his first tournament since naming his long-time rival as his new coach.
Djokovic, the men's record 24-time major winner, will begin his 2025 season at the Brisbane International against Australian Rinky Hijikata next week.
The Serb, 37, will be without Britain's three-time Grand Slam champion Murray, who retired from tennis in August, in Brisbane before they unite prior to the Australian Open, which starts on 12 January.
"He has a unique perspective on my game as one of the greatest rivals I've had.