On Monday in Sydney, Nick Kyrgios took on 14-time Grand Slam champion Rafael Nadal in a Fast4 exhibition that showcased Australia against the world, and he's left quite an impact.

Kyrgios beat the Spaniard, 4-3, 2-4, 4-3, 4-3 before his compatriot Bernard Tomic beat Austria's Dominic Thiem, 3-4, 4-2, 4-3, 3-4, (5-3).

Albeit an exhibition, Kyrgios needed to test out a knee injury that he was struggling with at the Hopman Cup with last week.

“If I can’t play Fast4 then it’s not going to be looking great for a best of five at a Grand Slam,” Kyrgios told reporters. “I had to test it.”

Any match against Nadal, even in a shortened Fast4 format (sets are shortened to four games with no-ad scoring, lets are played and there's a tiebreaker to five in lieu of a fifth set) is a test indeed.

But perhaps Kyrgios gave himself even more attention after his victory. To meet with press, the 21-year-old wore a shirt featuring U.S. President-elect Donald Trump covered in devil horns above an even bolder caption—“F*** Donald Trump.”

Kyrgios didn’t explain his choice of attire, just saying, "It's pretty self-explanatory, really.”