Frances Tiafoe is confident he can cause further shocks at Wimbledon after he claimed the impressive scalp of third seed Stefanos Tsitsipas in the opening round on Monday.

Unseeded American Tiafoe ousted Tsitsipas in straight sets, winning 6-4 6-4 6-3 to make the Greek the first major casualty of the men's draw.

Tsitsipas was in action for the first time since losing the French Open final to Novak Djokovic on June 13 and struggled to cope with Tiafoe's aggressive style, suffering a break of serve in the very first game.

While that was the only break of the first set, it gave Tsitsipas a deficit he never recovered from, and he was broken again at 4-4 in the second as Tiafoe made his lead even more commanding.

Tiafoe then saw things out impressively, his 17 winners to his opponent's 10 in the third set reflecting the American's greater confidence as he made Tsitsipas the first third seed to lose in the opening round of the grass-court tournament since Andre Agassi in 1996.

And Tiafoe reckons there is more where that came from.

"Definitely one of my best [performances], from start to finish it was pretty clean," the 23-year-old told the BBC.

"This is what you train for this is what it's all about. I live for these kind of moments.

"I'm not even close to where I want to be. I've had a lot of great achievements but I haven't even scratched the surface I feel personally.

"Today was big, I definitely needed that, a guy at his level, that guy's special, he's going to do a lot of great things, win a ton of grand slams but not today."

Tiafoe will face Vasek Pospisil or Roberto Carballes Baena in the next round.