So what if Federer is a six-time Australian Open champion, the owner of 20 major singles titles, a man who has spent more weeks ranked number one than any other and one of the most recognisable athletes on the planet?
The key stat Sunday night: Federer failed to convert any of the 12 break points he earned.
"There's nothing I can describe, I cannot describe it, I am the happiest man on earth right now", Tsitsipas said in his courtside interview. Tsitsipas will now face Spain's 22nd seed Roberto Bautista Agut in the quarterfinals.
Tsitsipas went 1 for 3 in that category, getting his only break in the last game of the third set.
The Australian Open served up another surprise earlier in the day when Russian tennis star Maria Sharapova crashed out of the tournament to 22-year-old local favorite Ashleigh Barty, but not before enduring the wrath of the crowd due to perceived dirty tactics. It was a dream come true for me just being on Rod Laver facing him.
"From the very beginning it was very important to keep that mindset, to believe in yourself, believe in your capabilities".
Warriors ride record first quarter to rout of Nuggets
Denver knocked off Golden State 100-98 in Denver on October 21 thanks to Juancho Hernangomez blocking a layup at the buzzer. The latest example of this came on Tuesday evening, when the Dubs traveled to Denver to take on the first-place Nuggets.
There was drama from the first game, when Tsitsipas was given two time violations, resulting in the loss of a first serve, and saved two break points. "I think we will see some athletic attacking tennis being played".
"I lost to a better player who hung in there and stayed calm, credit to him".
"I have massive regrets", Federer said. I thought conditions were a bit slower this year'.
Roger Federer heads off court as his opponent takes in the moment.
Two years ago, Rafael Nadal made the same mistake at the Paris Masters event, and the security guard let him through but not before asking who he was.
3, Roger Federer is will now be playing against Stefanos Tsitsipas in Round 4.