This light-hearted moment brought to you by the always entertaining Nick Kyrgios. Learn something new everyday, right Nick Kyrgios?

That was the case on Day 4, when Kyrgios learned a bit about how a proper foot-fault is called. Hint: you cannot call it until it happens. Watch below to see the funny moment.

Sometimes, you've just got to take them on the chin – right @NickKyrgios?#Wimbledon pic.twitter.com/SkgeXJbeuw

— Wimbledon (@Wimbledon) July 5, 2018

Kyrgios cruised past Dutchmen Robin Haase, 6-3, 6-4, 7-5 in 96 minutes and will next face Kei Nishikori in the third round.

The Aussie cracked 19 aces and won 43 of 47 first serve points, but he was broken twice by Haase. No matter, Kyrgios broke Haase five times on eight opportunities to improve to 12-4 lifetime at Wimbledon. He has made the second week on three of his four appearances, but fell in the first round last year.

Kyrgios is emerging as a threat to get deep in this draw, but he’s 0-3 lifetime against Nishikori. The pair haven’t met since 2016, and they’ve never played on grass.

“I grew up on grass,” Kyrgios said on Thursday. “I played on it when I was very young. We had Nationals back in Australia. I kind of always knew how to play on grass. I enjoy it. I think it's true tennis. There's a lot of interesting points on grass. People coming forward. You have to have good hands. Yeah, I mean, I enjoy it. I'm very comfortable on it.

The Greek has engineered the point of the tournament, and an important victory for himself and his country. “That dive was everything.”

That’s what 19-year-old Stefanos Tsitsipas said of the dive that helped him close out the seventh game of his 6-3, 6-2, 3-6, 4-6, 6-3 victory over American Jared Donaldson. You can view it below—prepare to have your mind blow.

“Welcome to the future of men’s tennis!”

19-year-old @StefTsitsipas defeats Jared Donaldson 6-3, 6-2, 3-6, 4-6, 6-3 in the second round – we won't tire of seeing more shots like this 😲#Wimbledon pic.twitter.com/KXmEqxbtMq

— Wimbledon (@Wimbledon) July 5, 2018

Tsitsipas, playing in his second Wimbledon, moves on to the third round at a major for the first time. He’ll face a friend in Italy’s Thomas Fabbiano.

Fabbiano defeated Stan Wawrinka in three sets to reach the third round at Wimbledon for the first time.

“I know him very well, we are very good friends with him actually,” Tsitsipas told a small gathering of reporters on Thursday afternoon. “It’s definitely going to be a tough battle against him, playing a guy who I know that well. … He’s a really nice guy but it will not matter tomorrow because tomorrow is a new day, a new beginning and what I need to do is play my game and stay humble because the tournament has just begun for me. It is an opportunity, I think of it as my chance.”

The Belarussian has a lot on her plate, but still relishes the progress she makes each week on the tour. It wasn’t the Wimbledon Victoria Azarenka wanted, but even the impetuous superstar knows that however impatient she may be at heart, some things take time.

Wimbledon 2018: Nadal's Jaw-Dropper | Seeds Scattered | Feli's Route 66 | Day 3 Schedule

After her 6-3, 6-3 loss to Karolina Pliskova that dropped her to 9-7 on the season, the 28-year-old shared her thoughts with media, saying that her life is a little more complicated now that she has a son and has been involved in a custody battle that has limited her time on court significantly in 2018.

“I think a lot of people don't really know on the daily basis what things that I have to go through, and that's okay,” she told reporters on Wednesday at Wimbledon. “But I think physically I'm very fit right now. Probably better than I have ever been before. But to be able to connect that with my tennis, it's been challenging and a little bit frustrating in a way, because, you know, sometimes when you're unfit or something, you're late to the ball or you're not making up steps or whatever. And for me it's the opposite and too early, I'm way too early to the ball, and then I have so much time that I'm thinking too much sometimes.”

It hasn’t been easy for Azarenka, a former World No.1 with two majors to her name, to get her once legendary game to click, but she believes it’s a process that will eventually work its way to fruition.

“That connection needs to happen at some point,” she said. “In practice, I'm able to manage it better, but in matches, it has to happen. But I think there is a progress from match to match, especially comparing my previous matches in Mallorca there is definitely a step forward, but it's not a finish line, for sure.”

Azarenka, much like Williams, is still trying to process the demands of motherhood and seamlessly weave it into the fabric of an elite tennis career. It hasn’t been easy, and they may not be the worst thing. Both Williams and Azarenka have expressed that they sometimes feel guild when they are pulled away from their children to practice or carry out the numerous other activities that a professional tennis player must complete.

Victoria Azarenka brought adorable little Leo to work today. pic.twitter.com/GnH2rU3GSh

— Tennis.Life (@tennislifenews) July 1, 2018

“The challenge is still to find the balance where I'm able to take some time for myself, which I don't like to do, and when I go out and practice or go out and play to be okay that I'm not spending this time with my son,” she said. “So I think it's still a balance that I need to do better at, but I'm learning.”

Azarenka will stay in London to compete in the mixed doubles tournament, pairing with Great Britain's Jamie Murray. After that she’ll play the Mubadala Silicon Valley Classic at San Jose, California, from July 30 to Aug 5.