He is not a bad salesman, either.
"Guys", he told the crowd, "if you haven't subscribed, please subscribe".
The 32-year-old Spaniard cracked 29 winners in a 6-3 6-4 6-2 victory.
Indeed, just after his interview, his subscriber tally climbed from around 23,000 to 29,000.
The machine learning system - called a Semi Supervised Generative Adversarial Network architecture - was trained on Hawk-Eye data from the 2012 Australian Tennis Open, provided by Tennis Australia. He was finally stopped by Federer.
Now, the new darling of Melbourne's large Greek community wants more.
Tsitsipas added further insult to Federer by taking a long time to walk back out onto court while Federer stood on the service line ahead of his service game. Of course I'm very happy with the way that I played tonight'. "I've been idolising him [Federer] since the age of six".
'It was really tough, ' Tsitsipas said when asked how he dealt with such a big result emotionally.
Tsitsipas finally relented when he pushed a forehand wide, having been wrongfooted by a deep and venomous shot.
Nadal's match against Tiafoe, who turned 21 on Sunday, was billed as an intriguing clash of generations after the loss of Roger Federer to Tsitsipas earlier, but the second seed was ruthless as he reached the last four without dropping a set.
Nadal, 32, had yet to drop a set through his four previous matches in the season's first major.
Video has since emerged on social media showing a 13-year-old Tsitsipas professing his love for Federer, and speaking about his plans to conquer the tennis world.
Tsitsipas grabbed a 4-2 advantage in the tiebreak and won the seventh point after he raced around the court to hit a defensive lob.
Sure, you might be ranked the 15th best male tennis player in the entire world, but that's not important.
There was no being overawed by the occasion or freezing in the clutch points, nor any of the failings that have tripped up so numerous young pretenders who have shared a court with the 20-times Grand Slam champion.
This, while his fellow "Next Gen" star and rival Alexander Zverev continues to struggle at the grand slams.
"That's why I get up in the morning and go to the gym and work hard".
"Petros my brother there.my father Apostolos and mother Julia".
"She's the mascot", said Tsitsipas.
The long-haired Tsitsipas, seeded 14, has been touted as a future Grand Slam champion and Federer had nothing but praise, saying he saw similarities to himself."He has a one-handed backhand and I used to have long hair, too", said the world number three.