The shirt shows a defaced picture of US President elect, Trump, with devil horns, crossed out eyes and a wide smile crudely drawn over the top. Below the picture is a slogan that ensures the wearer makes it clear they are not a fan of the billionaire, stating simple, "F*** Donald Trump."
Its unlikely Kyrgios' sponsors Nike would be pleased with his choice of apparel, given he is paid handsomely to sport their brand on the court.
Fairfax reported Kyrgios donned the shirt after his laundry failed to arrive, leaving him with few options in his kit bag, although the Canberra product returned to watch Australian teammate Bernard Tomic later in the evening in a Nike shirt.
Kyrgios offered little when asked about the meaning behind the Trump outfit. "It's pretty (self) explanatory," Kyrgios said.
The Aussie star has enjoyed a love-hate relationship with local fans, given his questionable behaviour at times on-court, and opinion on his latest move was again divided on social media.
Krygios will be hoping his tennis does the talking at Melbourne Park, when the first Grand Slam of the year begins. The win over Nadal has filled the young gun with confidence, despite ongoing injury concerns.
"Even though it was Fast4, you still take confidence out of how you were hitting the ball, the way you're serving, the way you're returning," Kyrgios said. "I thought I did everything pretty well. It was pretty tough. I though the level was high.
"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 said.
"But I'm really happy with how it pulled up. The level was really, really good. "I've just got to do all the right things: ice it now and look after it and just take extreme caution."
Kyrgios is a known basketball fan and revealed he sustained a knee injury shooting hoops, saying that passion has been put on hold while he concentrates on the Australian Open.
"I'm not allowed to," Kyrgios said. "Obviously I want to play but my team has told me: 'Nick, you've got a couple of pretty big couple of weeks now coming up.' I can play afterwards so I'm leaving it for a little bit."
Like him or not, Nick Kyrgios always manages to get people talking.
