When Kyrgios was 4-1 up in the first set, with Wawrinka serving, the Aussie absolutely nailed a forehand victor that left his three-time Grand Slam-winning opponent grasping at thin air and applauding the shot. "It gave me the win at the end".
"I remained tough", Tsitsipas said.
"But no, it doesn't really matter if people mispronounce". I had to trust the process and be patient and that's probably the biggest lesson I've learned because I probably wasn't that patient throughout my life!
Zverev rolled over Russian Daniil Medvedev 6-3, 6-2 in 52 minutes while never facing a break point.
Kyrgios, from Australia, broke Wawrinka twice in the first-round match and had seven aces in a dominant first set. So now I'm going to use it in my favor for my next match against him and try to get the most out of it.
"I've had plenty of success in Toronto and Montreal, and I wanted to start off well", Djokovic said.
"I think that format needs to be changed. That I have the level to be there, to compete in the Top 100", Auger-Aliassime said. I was like, OK, it's all exciting.' Like, I had plans for my birthday. "And now that the tournament is here, it's like I have another priority". He broke Kyrgios in the final game of the third set, converting his second match point opportunity when the Australian couldn't handle his return.
Tsitsipas let a double-break point opportunity slip at 4-4 in the second set, eventually giving up the game after back-to-back shanks.
Meanwhile, Rafael Nadal battled past an improving Stan Wawrinka, withstanding some of the Swiss player's best tennis in months.
Seeking a fifth Rogers Cup crown, former world number one Djokovic fell to 19-year-old Tsitsipas 6-3 6-7 (5-7) 6-3. It really frustrates me.
Shapovalov downed France's Jeremy Chardy in straight sets in the first round Tuesday night in front of a packed and supportive crowd at centre court that included Edmonton Oilers captain Connor McDavid.
The best match of the day lived up to the billing as Stan Wawrinka edged Nick Kyrgios in a thriller 1-6, 7-5, 7-5.
The Serbian will play Pole Peter Polansky in the second round.
But it was Wawrinka who stole the show with a moment of genius - when it looked as though the ball was beyond his reach - the three-time Grand Slam champion pulled off a magical return.
Four-time champion Novak Djokovic and top seed Rafael Nadal have advanced to the third round of the weather-interrupted Canadian Open.
All the quarter-finals matches to be played on Friday in Toronto.
Del Potro, who had a bye in the first round, was set to play Robin Haase of the Netherlands on Wednesday.
Raonic came out firing after the delay, breaking Tiafoe's serve then holding to force a third set.