Australian Open 2019: Stefanos Tsitsipas relishing match against idol Roger Federer

[Mark-x]

 Perhaps when you want to learn a new cooking recipe, or when you're struggling with some tricky DIY. Maybe when you're getting stuck on the pronunciation of a trickily spelt tennis player.

Prodigious Greek talent Stefanos Tsitsipas? He used the video-sharing website to learn from his idol Roger Federer.

Now the pair will be filmed together on court in a case of the master versus the apprentice when they meet in the Australian Open fourth round on Rod Laver Arena.

It will be their first competitive meeting, although they did play in the Hopman Cup last month when Federer nicked a tight two-set win.

"It will be a great day facing him in one of the world's best arenas. I'm really excited," Tsitsipas said.

An up-and-coming talent facing a player who's been put on a pedestal in their formative years is nothing unusual.

There is, however, little usual about 20-year-old Tsitsipas in comparison to his peers.

A playing style described as "old-school", his own travel vlog, a love of photography, a flowing mane of hair… it all adds up to Tsitsipas being one of the most talked about young talents on the ATP Tour

Tsitsipas's fondness for wandering around the cities he visits and filming what he sees, describing those scenes on his social media accounts with what can be interpreted as 'philosophical' messages, has led to some public - and some might say cruel - Mickey-taking from Nick Kyrgios and other peers.

After his third-round win over Georgia's Nikoloz Basilashvili, Tsitsipas admitted he does not have many friends in the locker room.

"I think I'm comfortable meeting new people and having a discussion with someone," he said when asked about his perceived shyness.

"Not many of the players want to be friends on the tour. That's a problem.

"That's an issue unless you speak the same language. That makes sense.

"But I would love to have more friends on tour."

Greek journalist Vicky Georgatou, who first met him as a teenager, says that being what some might term a "loner" is nothing new for Tsitsipas.

"His father told me when Stefanos was a little boy he didn't have many friends," she told BBC Sport.

"But he liked it that way. It wasn't a problem.

"He's not like the other guys on their phones, playing games, he likes to take pictures, he likes to read, he's very different."