"Watching her is so motivational to you, it inspires you".
In men's singles, Nadal defended his title with an easy win over Daniil Medvedev of Russian Federation in the summit clash on Sunday.
We discussed Andreescu's victory in Toronto and what may lie ahead for the teenager. She had only played one match in 134 days prior to her Toronto comeback. Back then, she chose to roll right into the next tournament.
"I just knew", said Williams, adding she´d undergone hours of treatment before the match to combat the back spasms she´d first felt in a semi-final win on Saturday night. "I know now that I need to schedule my tournaments a little better".
"I have more to learn".
And on Monday, she will move into the top 20 of the WTA rankings at world No 14. "I think I would have really regretted not at least going out there and seeing maybe if a miracle happened", she explained. Monfils withdrew from the tournament following an ankle injury. "I've had many, many tough matches, (but) I kept telling myself, 'Never give up.' I tried to look at it all as a challenge and not a setback".
"I'm obviously happy to be back playing". However, the 37-year old star had some praise for Andreescu as well.
It's just the latest victory in an astonishing year on the courts for Andreescu, who is quickly becoming a household name.
Three-time grand slam champion Andy Murray said he needs time to get back to his best after opting not to play singles at the upcoming US Open.
Williams required a caesarean during the birth, which sidelined her for weeks in recovery.
"I'm sorry I couldn't do it today", Williams said on the court.
The first Canadian in half a century to win the home trophy said she did not want to take any risks after missing more than two months - and Wimbledon - with shoulder problems before returning to action this week. "So having those words come out of her mouth about me is pretty damn awesome".