TORONTO, Canada - Canadian teenager Bianca Andreescu emerged victorious from a third straight three-setter at the Rogers Cup, and against her toughest opposition yet to reach the quarterfinals against No.5 seed Kiki Bertens, outlasting the big-hitting Dutchwoman, 6-1, 6-7(7), 6-4.

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"These last three matches were pretty crazy, but that's just how tennis goes. You have to find a way," Andreescu said in her post-match press conference.

Andreescu narrowly survived against countrywoman Eugenie Bouchard and former World No.10 Daria Kasatkina just to make the third round of only her third tournament since winning the BNP Paribas Open, and shook off a second set hiccup and a late surge from Bertens to thrill the Centre Court crowd once more after one hour and 50 minutes.

"Sometimes you're not going to play your best tennis, so you just have to find a way with what you have that day, and I think that's what I've been doing these past couple matches."

The match had barely begun when rain forced the combatants off court after just four points. Undaunted, Aundreescu got on the board first upon resumption and weathered a second, shorter spell of rain to sprint through the opening set, striking eight winners to just one unforced error.

"Today, I think I played better than my other matches, especially in the first set. I was on top of the ball, every ball. My serve was really effective as well."

Bertens was playing just her second hardcourt match since Miami - opting instead to play the Palermo Ladies Open on clay following the Wimbledon Championships - but is still a force on this surface, having won the Western & Southern Open, a Premier 5 tournament, in Cincinnati last summer.

The reigning Mutua Madrid Open champion took a quick 3-0 lead to start the second set, but it was Andreescu, spurred on by the crowd, who quickly leveled proceedings and kept things on serve as the two headed towards a tie-break.

Up 5-2 in the ensuing Sudden Death, the 19-year-old appeared to have things wrapped up when she earned her first match point, but Bertens saved it and soon had set points of her own, converting her second to level the match.

Where one would expect Andreescu to reemerge deflated, she Canadian youngster stepped in and hit harder, taking an ostensibly insurmountable 4-1 lead.

"As expected, Kiki came back. That's what top players do. They try to figure out what was going wrong. And she flipped the switch a little bit in the second set, and the same thing in the third set. I was up 4-1, and then she started playing better. I let my guard down just a little bit."

Sensing fatigue from her opponent, Bertens pounced, tying up the set at four games apiece - saving a break point in the eighth game- but it was Andreescu who came to life when it counted, reversing a 40-15 deficit in the final game to earn more match points, securing her fourth on a double fault.

"Being off for that long and coming into the Rogers Cup and getting into the quarterfinals means so much to me. But at the same time, I'm not surprised because I've been playing a lot of matches, especially at the beginning of the year.

"So I gained a lot of experience from that, and this time off actually really helped me. I figured a lot of things out and it's showing on the court."

Standing between Andreescu and a spot in the semifinals is former World No.1 Karolina Pliskova.

"I guess this match was a good warmup for tomorrow's match. I think I worked a lot on my return today.

"I'm going to study her, study where she likes to serve to, just so I can be ready for those return games. Because every point is important, so I'm trying to get as much as I can."

The three-time WTA Ace Leader must make the semifinals in Toronto to have a shot at the No.1 ranking currently held by French Open champion Ashleigh Barty, though displacing Naomi Osaka is currently in pole position to wrest the top spot from Barty after reaching the third round.