"It's my biggest dream", said Tetipas, who is nearly unbelievable in an interview on the pitch, "I think it's the happiest moment of my life".
"I thought Tsitsipas played very well and he deserved to win without a doubt", Djokovic said.
Kevin Anderson beat Ilya Ivashka 7-5 6-3 but his Wimbledon semi-final opponent John Isner didn't fare as well, losing 7-6 (7/5) 7-6 (7/0) to Karen Khachanov.
The 21-year-old German moved ahead early in the second set but Tsitsipas broke at 3-5 and held serve to pull event. "I would say I played OK". I don't think he played well.
"The early break in the third set was everything". "It's true that with my serve in the second set I had some troubles but my return was working well.it was more about the mistakes from the baseline in my opinion". But I feel like his game style will just suit me a bit more compared to playing someone like Federer, one of the big three, one of the big guys.
One can be forgiven for thinking that Djokovic played poorly, but that wasn't the case.
Djokovic, coming off his fourth Wimbledon title last month, had seven aces and never faced a break point in the 1-hour, 25-minute match. We had a good quality of tennis.
"I mean, Denis is already established top 50 player, and he's making his way up", he added. But the teen converted all four of his break-point opportunities, while Zverev was five for 14. But in the third and final set, Tsitsipas showed maturity that is beyond his age, maintaining a calm mind throughout and claiming a relatively easy win (6-3), shocking the entire tennis community.
In the doubles quarterfinals, the top-seeded duo of Austria's Oliver Marach and Croatia's Mate Pavic edged Jean-Julien Rojer of the Netherlands and Romania's Horia Tecau 6-7 (5), 7-5, 10-6.
Grigor Dimitrov will face Anderson next after finding some of his best serving to beat Frances Tiafoe 7-6 (7/1) 3-6 7-6 (7/4). Haase instead played Mikhail Youzhny, beating the Russian 7-5, 6-2. He rose to prominence previous year with a stellar run at the Rogers Cup in Montreal that ended with a semifinal loss to eventual champion Alex Zverev.