MONTRÉAL, Canada – No.10 seed Madison Keys edged past Venus Williams in a tight three sets to snap up one of the last quarterfinal spots in the Rogers Cup.

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Keys has looked dominant in all of her matches so far in Montréal, her first tournament since her run to the fourth round of Wimbledon. Although she went into the match against Williams trailing 2-1 in their head to head, she had the added confidence of splitting their last two matches on hard courts – both of which were three-set battles.

“I’m excited,” the 21-year-old said yesterday at the prospect of playing Williams. “It’s always tough playing her.She’s obviously a great player.

“She did well last week, so it’s going to be a tough match. But I’m looking forward to it.”

Williams started out shaky in the opening set as her service woes reared their head once again. She’s struggled with normally trusty shot all tournament long, and in the first few games barely managed to crack the 90 miles per hour mark. Keys, a strong returner, took advantage of the lapse and stayed aggressive to take the opening set 6-1 in just 20 minutes.

“Her first serve was definitely slower than normal,” Keys acknowledged after the match. “But it was funny, her second serve was a lot slower, but because of the court it was bouncing a lot higher than normal. So while her first serve was a little easier to return, her second serve was really tough.”

Williams looked in trouble again in the second set as she quickly went down a break, but the 2014 champion shook off the disappointing start. Keys allowed more errors to spray from her racquet as Williams backed up her vulnerable serve with pinpoint groundstrokes – especially off of the forehand wing. She dominated the tiebreak to force a deciding set.

But after the enormous effort it took to get back on course, it just didn’t look like Williams had any more left in the tank for the final set. She couldn’t maintain her level, allowing Keys to get back to her attacking ways. Keys broke early on in the set and relied on her serve to keep her nose ahead until she took the match 6-1, 6-7(2), 6-3.

She’s set to face Anastasia Pavlyuchenkova in the next round, whose monumental effort against Agnieszka Radwanska earned her a spot in the quarterfinals.

“It’s going to be a tough match,” Keys said of her always-aggressive Russian opponent. “She’s always tricky because she definitely fights till the end and she’s going to hit a lot of winners.

“I think it will be similar to today, you know, kind of deciding when to just get the ball back in a good, neutral spot, or when to kind of pull the trigger and be a little bit more aggressive.”