Novak Djokovic advanced to the second round with a 6-3, 7-6 (9-7) win over lucky loser Mirza Basic at the Rogers Cup on Tuesday.
The Wimbledon triumph last month was Djokovic's first Grand Slam since the 2016 French Open as he overcame Kevin Anderson in straight sets after downing Nadal in the semis, express.co.uk reads.
Holding his nerve, Tsitsipas hit a stunning backhand down the line to break serve in the second game of the third set - and never looked back.
Four-time champion Djokovic was sent packing by in-form Greek teenager Stefanos Tsitsipas in a shock upset at the ATP 1000 tournament.
"I know how many friends wanted to come out today and how many fans were looking forward to seeing me on centre court this week", said Shapovalov, who grew up in nearby Richmond Hill, Ont.
"I was serving well so that break was everything", Tsitsipas said.
The top-ranked Canadian in the men's singles draw at No. 26, Shapovalov let out an emphatic yell when he sealed the victory in front of a cheering home crowd that included Edmonton Oilers captain Connor McDavid. "That's what I needed, a match like this to be a little bit more confident and I did it".
Swiss wild card Stan Wawrinka played the shot of the Rogers Cup in Toronto as he went down to top seed Rafael Nadal on Thursday.
"I've had all types of matches in my career", said Sharapova, now No. 22 in the world. "Happy to see Stan playing that well again", Nadal said.
In second round play, Grigor Dimitrov survived a lengthy rain delay to turn away Fernando Verdasco in a final set breaker and in the early morning hours Marin Cilic got past countryman Borna Coric also in three. "Losing in this kind of tournament, it's not something I don't care about". Montreal's Felix Auger-Aliassime, competing on his 18th birthday, followed with a three-set loss to Russian qualifier Daniil Medvedev. The former champion, though, sealed the win, 6-3, 7-6 (3).
Cornet, ranked 30 places below world number four Kerber, won 6-4, 6-1 in the second round of the Women's Tennis Association Premier 5 tournament.
Meanwhile, third seed Juan Martin del Potro was forced to withdraw prior to his opening match due to a left wrist injury.
Eighth-seeded John Isner, the American who won at Atlanta two weeks ago, beat France's Pierre-Hugues Herbert 7-6 (7-3) 6-2 but Italy's 14th seed Fabio Fognini, coming off a victory at Los Cabos, suffered a 6-3 7-5 (16-14) defeat to Canadian young gun Denis Shapovalov. In other second-round action Wednesday, second-seed Zverev defeated American Bradley Klahn.