The 19-year-old Andreescu has now won 17 consecutive matches, not counting when she has had to retire from matches due to injury.
All that play time after a lengthy layoff took its toll on Andreescu, who needed a medical timeout in the second set for treatment on her groin.
Despite the unfortunate ending to the match, 19-year-old Andreescu emerged triumphant to hoist her second title of her season and career, after her sensational run to the BNP Paribas Open championship in March.
She hugged Williams, one of her tennis idols, comforting the tennis great in what was obviously a painful and hard moment. Her most recent loss not related to a match retirement was at the hands of Kenin, in the semifinal in Acapulco, Mexico, back in February. You are truly a champion on and off the court. "Let's wait and see two or three years how well as she goes".
Andreescu will rise to 14th in the world on Monday, replacing Amanda Anisimova as the highest-ranked teenager in the women's game. "I tried, but I just, I couldn't do it".
Andreescu got 62 percent of her first serves in play and saved five of her seven break points.
Throw in the fact that Sunday's women's doubles finals also starred a Canadian, Gabriela Dombrowski, and the stage was set for as highly-anticipated a final day as there's been at the Rogers Cup.
Andreescu screamed as she tied the third set 3-3, but Pliskova fired two aces for the final two points of the seventh game to retake the lead. "But I just I couldn't do it. Thanks to Jehovah for letting me come out here".
All eyes are on Bianca Andreescu in her hometown of Mississauga. Her overhead-smash-turned feathered touch in the eighth game of the opener was an utter delight for the pro-Canadian fans to witness and she pumped her first after converting on her fourth break point of the set to take it 6-4.
"I try to channel that pressure into something good", said Andreescu.
But the six-times U.S. Open champion, still without a title since returning from maternity leave in 2018, now faces her latest setback with the year's final Grand Slam just two weeks away.
As for Andreescu, her rise has been meteoric and much deserved, capturing wins against top-ranked players as her relentless and extremely tactical approach has caused fits from day one - which is nothing new for the five-time junior title victor. She won in 2001, 2011 and 2013 - all in Toronto - and has a tournament-record 34 victories in 38 matches.