Andreescu and Serena were both mic'd up, and you can hear the former ask if Serena was okay as she embraced her in a hug.
The 19-year-old from nearby Mississauga, Ont., held on for a 6-4, 7-6 (5) victory over Sofia Kenin of the United States on Saturday afternoon.
The 37-year-old Williams is ranked 10th and seeded eighth in her first event since she lost the Wimbledon final.
Of course, nobody will complain about the result, which saw 19-year old Canadian sensation Bianca Andreescu cap off a week that saw her beat three top-10 players en route to becoming first Canadian singles victor at this event in 50 years.
With Andreescu up 5-2 in the second set, Kenin roared back to win three straight games and later saved three match points with the Canadian leading 6-5, including winning a 17-shot rally to stay alive on the first match point.
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. "Life is freaking fantastic right now". She captured the title in Indian Wells, Calif., back in March, as part of a 10-match win streak.
It's just the latest victory in an astonishing year on the courts for Andreescu, who is quickly becoming a household name.
There have been plenty of great moments for Canadian tennis fans at this tournament over the last twenty years.
The Canadian missed a clear opportunity to go up 6-3 in the second-set tiebreak when she sailed an overhead smash long.
She'll play the victor of the second semifinal between American Serena Williams and Marie Bouzkova of the Czech Republic. She dropped to her knees and covered her face before kissing the Aviva Centre's hardcourt.
"In the third set I told myself 'go big or go home.' Literally go home. The past couple of months have been so so so so tough", said Andreescu about her post-match celebrations.
I'll take Serena to win her first title in more than two years, but I don't love it. Andreescu's leg was also taped as she was felled by groin issues earlier in the tournament. "It's just so incredible that I'm in the final of the Rogers Cup. So I'm going to go out there and just give my best performance". In the victory, Serena won 81 percent of her first serve points and 44 percent of her second serve points. Serena has won six of her last eight matches on hard court. Andreescu caught the eye of her parents in the stands and pointed at her groin as she made her way off the court.
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