A fan returns Nick Kyrgios' racket to him at Wimbledon. (Getty Images)
A fan returns Nick Kyrgios' racket to him at Wimbledon. (Getty Images)

Nick Kyrgios burst onto the scene at Wimbledon in 2014 with his upset of Rafael Nadal on his way to a quarterfinal appearance. The 20-year-old Australian is known as much for his antics and emotion on the court as he is for his skills, and on Friday at Wimbledon both sides of Kyrgios were on display.

Kyrgios won his match against No. 7 Milos Raonic in four sets (5-7, 7-5, 7-6, 6-3) and in doing so blasted 34 aces and 61 winners. Kyrgios also showed off his temper when he slammed his racket down in frustration after a point. He slammed it so hard that it bounced up and into the stands where a fan caught it and was kind enough to return it to him. 

Kyrgios' eventful day also included a bit of controversy over his headband, which, despite being an official Wimbledon headband, had to be flipped inside out because it did not fit the Wimbledon dress code -- players are not allowed to wear any clothing that isn't all-white (aside from logos). 

Nick Kyrgios wearing his blue and green headband prior to being forced to flip it (Getty Images)

Nick Kyrgios wearing his blue and green headband prior to being forced to flip it (Getty Images)