Bernard Tomic withdraws from warm-up match, rules out matchup against Nick Kyrgios

Bernard Tomic has withdrawn from tonight's Murray River Open match with fellow Aussie Marc Polmans.

Tomic was set to face Polmans in a first-round clash but has been forced to pull out due to a knee injury. Fellow Aussie Harry Bourchier will replace him.

Tomic's withdrawal means fans won't get to see the former world No.17 face Nick Kyrgios, with a second round match-up initially on the cards had both players played and won their respective opening round clashes.

Kyrgios is scheduled to face Frenchman Alexandre Muller on Tuesday afternoon.

However, Tomic's decision to pull out of tonight's match may come as a surprise to some after he posted a video to Instagram of him playing basketball just hours before he withdrew.

"Ball or Tennis," Tomic's caption read.

Tomic will now head into next week's Australian Open without any warm-up matches under his belt.

Now ranked No.228, Tomic qualified for the Australian Open earlier this month after making through the qualifying stages.

He defeated John-Patrick Smith 6-4 5-7 7-6 (10-7) in his third and final qualifying match to earn a spot in next month's event.