Andy Murray’s joked that he’ll use his position as Novak Djokovic’s coach to “sabotage” his chances of winning the Australian Open.

The Serbian, with 7 Wimbledon titles, beat Murray in four Melbourne finals during the former British number one’s playing career.

The once rivals are now working together and are preparing for the first major of the season, which starts on Sunday.

Murray says he couldn’t turn down the “unique opportunity” to coach Djokovic.