Say what, say what, say what, anything can happen at the Rogers Cup in Toronto.

On Friday former No. 1 Carolina Wozniacki beat current No. 1 Karolina Pliskova 7-5, 6-7(3), 6-4 to advance into the semifinal after four rain delays.

On Saturday she will meet unseeded American Sloane Stephens, who defeated Czech Lucie Safarova in only her third tournament of 2017 after returning from a foot injury.

“Almost every tournament I’ve played this …

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Rafael Nadal left Center Court in Montreal Thursday night in shock after squandering a 30 third set tiebreak lead to lose 7 of the last 8 points in a 36, 64, 76(4) loss to 18-year-old Denis Shapovalov of Canada.

Nadal was just needed two wins to return to No. 1 and surely he would have no problems with the 143rd-ranked teen. But the Shapovalov stepped up and took it Nadal and …

The Cincinnati draw takes place Friday night, but before then the withdrawals continued. Defending champion Marin Cilic has pulled out due to the same adductor issue which forced him out of Canada.

“I was really eager to play in Cincinnati, where I’ve won my first career ATP Masters 1000 singles title last year and where I had one of the best performances during my career, but I still don’t feel at …

Simona Halep dropped just one game in a 6-1, 6-0 victory over Barbora Strycova to reach the Toronto quarterfinals. Halep, who won the title last year in Montreal, moves to 4-0 against the Czech.

Halep now faces Frenchwoman Caroline Garcia who upended American CiCi Bellis 6-4, 6-2.

New No. 1 Karolina Pliskova opened the day with a 6-2, 6-7(4) 1-0 retirement win over Naomi Osaka who had to call it quits do …

Rafael Nadal bid for No. 1 ranking on Monday ended at the hands of young Canadian Denis Shapovalov. The 18-year-old stunned the 3-time tournament champion 3-6, 6-4, 7-6(4) in the third round of the Canadian Open.

After squeezing out the second set, Shapovalov had to save six break points against him from Nadal. Then had to overcome a 3-0 deficit in the third set tiebreaker and he did it in magical …

Wednesday was upset day at the Canadian Open as three Top 10 seeds and five total went down in Montreal.

Upset-makers were France’s Gael “Force” Monfils topping No. 5 Kei Nishikori 6-7(4), 7-5, 7-6(6); France’s Adrian Mannarino ousting No. 6 Milos Raonic 6-4, 6-4; and South Korea’s Chung Hyeon downing No. 9 David Goffin 7-5, 6-3.

“It’s a good victory for many reasons,” said Monfils, who saw Nishikori serve for the match …

After withdrawing from Canada, Andy Murray has added Cincinnati to his summer pull-outs due to continued issues with his hip.

“Unfortunately I won’t be playing in Cincinnati as I continue my recovery,” Murray said. “I always enjoy playing there and I look forward to returning next year. I’m continuing to work hard on the court with the aim of being in New York.”

Murray is a 2-time champion in Cincinnati and last …

On a big Wednesday of play, former champions Roger Federer and Rafael Nadal open action in Canada. Federer, a 2-time winner, will face Canadian Peter Polansky first match on center while 3-time champ Nadal collides with Borna Coric in the early evening.

Former finalist Milos Raonic is on against Adrian Mannarino and 2016 runner-up Kei Nishikori clashes with Gael Monfils in maybe the best match of the day.

Juan Martin del Potro …

Seeds went 4-0 Tuesday in Toronto with former champions Caroline Wozniacki and Agnieszka Radwanska both advancing along with Elina Svitolina and Elena Vesnina.

Wozniacki rolled past qualifier Ekaterina Alexandrova 6-3, 6-0.

“It was a pretty good match. I kind of got to find my rhythm in the beginning but thought I served and returned very well,” Wozniacki said. “Once I got going, I kind of started to play better. It’s always nice …

Dominic Thiem is among the very best of the younger generation. The 23-year-old has wins over Rafael Nadal, Novak Djokovic, Andy Murray and Roger Federer, and he’s twice made the semifinals at the French Open. So he has the wins and the results, but he says, the problem isn’t beating a Big 4 player, instead, it’s having to beat more than one to win a big title.

Maybe the gap is …

Roger Federer turns 36 today! A year ago the Swiss was home rehabbing a knee after ending his season leaving many to wonder if Federer would ever return to the top of the game.

But now Federer is in a 2-man race with Rafael Nadal for the year-end No. 1 ranking after capturing Grand Slam titles No. 18 and No. 19 at the Australian and Wimbledon….

Nick Kyrgios says he and countryman Bernard Tomic are not bad guys, despite all the negative publicity they receive.

We all make mistakes,” Kyrgios said Monday in Montreal. “Bernard is struggling at the moment. He doesn’t really know what he wants to do. I respect that. He deserves every right to be happy and try and find what makes him happy. If that’s not tennis at the moment, then so be …

Juan Martin del Potro ended the recent run of John Isner stopping the American’s 8-match win streak with a 7-5, 7-5 win in the Canadian Open first round.

“It’s amazing for me,” said del Potro.” I missed this tournament a lot. I couldn’t play the last editions because of my wrist. But now I’m in good shape. I have the chance to play after many years, and I started by …

American pals Madison Keys and CoCo Vandeweghe slugged it out in the Sunday final of the Bank of the West Classic in Stanford, Calif., then consoled each other by huggling it out on the sidelines, with Keys sitting in Vandeweghe’s lap.

Keys was the victor after the smoke cleared in the huge-hitting confrontation, coming away with a 7-6(4), 6-4 victory and her first title on American soil.

“I just knew that if …