Australian tennis star Nick Kyrgios has made a strong political statement heading into the Australian Open, wearing an anti-Donald Trump t-shirt after his Fast4 victory over Rafael Nadal in Sydney.

Kyrgios, who was forced to scramble through his bag for a shirt after his laundry didn't arrive following his match against Nadal, is clearly no admirer of the US President-elect.

The world No.14 had just strapped ice on his injured knee when he was summoned to the post-match press opportunity, grabbing the eye-catching shirt so he could fulfil his media obligations.

The 21-year-old wore a shirt that had Trump's face covered with devil-like illustrations and the words "F--- Donald Trump" down the bottom.