Andy Murray plays a backhand in a warm-up session during Day 1 at the 2018 Brisbane International at Pat Rafter Arena on December 31, 2017. The world No 16 withdrew from the tournament on Tuesday. Bradley Kanaris / Getty Images
Andy Murray plays a backhand in a warm-up session during Day 1 at the 2018 Brisbane International at Pat Rafter Arena on December 31, 2017. The world No 16 withdrew from the tournament on Tuesday. BraShow more

Andy Murray's Australian Open ambitions up in the air after pulling out of Brisbane International