If the fans had their wish, Caroline Wozniacki would be facing local favourite Eugenie Bouchard in the third round of the Rogers Cup women's draw on Thursday.

Instead, the former world No. 1 from Denmark will play Shelby Rogers, the American qualifier who put a quick end to Westmount, Que., native Bouchard's homecoming tournament in the second round.

Wozniacki breezed through a second match in a row with a 6-1, 6-2 win over Klara Koukalova on a side court on Wednesday. She has lost only five games in two matches so far at the hardcourt event.

"It's my favourite surface," she said. "I've been playing pretty well lately.

"Montreal has always been a good place for me, winning here a few years ago (2010). I'm feeling good and hopefully I can keep going."

In the evening feature, world No. 1 Serena Williams dispatched Samantha Stosur 6-0, 6-2 in a match interrupted 28 minutes by a sprinkle of rain.

Williams, the defending champion who is coming off a victory Sunday at Stanford, then surprised the centre court crowd by doing a courtside interview in French.

Wozniacki is coming off her first win of the season at the Istanbul Cup, where she dropped only two games while beating Roberta Vinci in the final.

Wozniacki to face Bouchard foe

Now ranked 13th, Wozniacki will face the world No. 113 in Rogers, who played the spoiler as Bouchard battled rust and her nerves on Tuesday night.

"I know how she looks like, but I don't know much about her game," said Wozniacki. "I will definitely have my team tell me how she plays."

It promises to be a quieter match than if it was Bouchard, who had the packed centre court solidly behind her, as well as her Genie Army fan group in from Australia.

"I don't really care, to be honest," added Wozniacki. "Obviously, Rogers must have played really well to beat Genie.

"With the whole crowd, as well, for Genie, you know it wasn't easy. But for me, it's a new match. It doesn't matter who's on the other side."

If she keeps winning, it may draw attention back to her tennis game and away from her famous split in May with golfer Rory McIlroy.

Both players seem to be doing better since then, with McIlroy following his British Open title with a win at last week's Bridgestone Invitational.

"I've moved on. I hope everyone else has moved on, too," said Wozniacki, who will be running the New York Marathon in November, when the wedding was to have been.

Williams needed only 59 minutes of playing time to improve her career record against Stosur to 7-3.

Next she will face 15th-seeded Lucie Safarova, against whom she is 6-0. Safarova beat Magdalena Rybarikova 6-4, 6-2.

"She is an interesting player," Williams said of Safarova. "She's extremely tricky.

"We've had some tough matches. I know we've gone to three sets on occasions. It's definitely not an easy match for me."

Williams has won the Rogers Cup three times when it is held on alternate years in Toronto, including last year, but she has not played in Montreal since she retired from the final with an injury in 2000. Odd, since she'd be a natural favourite for the mostly French-speaking crowd.

"I'm really happy to be a part of the tournament this year. It's just really cool," she said. "I've actually been studying French for most of my life, so yeah, I should be able to speak even better, to be honest.

"I love it in Canada because I understand everything. It's a lot easier for me to speak. The accent is much easier for me to understand."

Sharapova overcomes rough start

In a centre court match, fourth-seeded Maria Sharapova survived a rough first set to down world No. 27 Garbine Muguruza of Venezuela 4-6, 6-3, 6-1.

"I was happy that I was able to turn it around," said Sharapova. "I didn't feel good.

"I made a lot of errors in the first set. When you're able to finish stronger than your start, that's always a positive because you give yourself an opportunity to keep playing in the tournament."

Her next opponent is 14th seeded Carla Suarez Navarro, who got past lucky loser Karolina Pliskova 6-1, 3-6, 6-3.

British qualifier Heather Watson upset 10th-seeded Dominika Cibulkova 6-2, 6-7 (3), 7-6 (5). Watson let a 5-2 lead slip away in the third set before rallying for the victory.

The 22-year-old will face eighth-seeded Victoria Azarenka in the third round on Thursday.

Watson won two qualifying matches on the weekend before downing Tereza Smitkova in the first round. Cibulkova was coming off a first-round win over 17-year-old Francoise Abanda of Montreal.

Angelique Kerber, the sixth seed, ousted Caroline Garcia 6-4, 6-1. The two faced one another in Madrid in May, with Garcia winning when Kerber retired in the second set with a back injury.

Second seed Petra Kvitova downed Casey Dellacqua 6-3, 6-2 and American qualifier Coco Vandeweghe upset ninth seed Ana Ivanovic 6-7 (7), 7-6 (7), 6-4 in the late matches.

In doubles, Muguruza and Saurez Navarro beat Abanda and Stephanie Dubois of Laval, Que., 6-3, 6-4.