TORONTO -- Serena Williams continues to mow down her opponents at the Rogers Cup womens tournament. The top-seeded American eased past Magdalena Rybarikova of Slovakia 6-1, 6-1 on Friday for a spot in the semifinals. Williams has yet to be challenged through three matches, dropping only a combined 10 games in the process. She blasted seven aces past the outclassed Rybarikova and wrapped up the match in a tidy 60 minutes, five seconds. "Yeah Im definitely feeling pretty good, playing much better than I have the past month I would say," said Williams. "Im glad Im getting back to the feeling and getting into some rhythm." Rybarikova, who advanced to the quarter-finals when reigning Wimbledon champ Marion Bartoli retired from their match with an injury, was thoroughly dominated but managed to avoid bagels. Williams, a two-time Rogers Cup champion, is looking to add to her seven titles this season, including a win last month in Sweden. Shes sure to give her next opponent, three-seed Agnieszka Radwanska, all she can handle. Radwanska advanced Friday with a 7-6 (1), 7-5 victory over fifth-seeded Italian Sara Errani, but has never beat Williams in five of their meetings, including last years Wimbledon final. "Its a good matchup," said Williams. "She does everything so well. Shes playing better too actually so shes having a much better year. Its going to be an interesting match. Its definitely not going to be easy. "I can only hope that I play well and I can only hope that I come out on top." Meanwhile, the upset of the day belonged to unseeded Romanian Sorana Cirstea who knocked off defending champion Petra Kvitova with a 4-6, 7-5, 6-2 decision. Kvitova struggled mightily with her service game. The Czech double-faulted 10 times, her ninth coming on a break point for Cirstea to open the third set 1-0. "The beginning of the second set I started to feel a little bit low of the energy," said Kvitova. "The serve was really bad after this, and I didnt find energy from my legs." Kvitova pointed to her late third-round match against Australias Samantha Stosur as the reason she was sluggish on the court. "Unfortunately when I finished so late the match here, I didnt sleep well after this," said Kvitova. "Sleep is, for me, its very important ... for my recovery." Cirstea, ranked No. 27 in the world, used the momentum from Kvitovas unforced errors to match her best result of the season with a semifinal berth. The 23-year-old Cirstea got past former top-ranked players Jelena Jankovic and Caroline Wozniacki to reach the quarter-finals. "Its probably (my) best tournament in a long, long time," said Cirstea. "It might come as a surprise to many people ... I dont think for me and my team its such a big surprise because we have been working consistently on things." Shell next take on fourth-seeded Li Na of China, who defeated Dominika Cibulkova of Slovakia 7-6 (1), 6-2. Li, last years finalist, needed 96 minutes to get by the world No. 20-ranked Cibulkova, who came into the tournament on a roll with a recent title victory over Radwanska at Stanford, Calif. Li broke to make it 6-5 in the first set, taking the game with a blazing cross-court winner, but couldnt hold and needed a tiebreak to win the set. She cruised through the second set en route to her first semifinal berth since losing at Stuttgart in April. "I mean, after (the) first I was thinking about, OK, one set in the pocket, so (I was) feeling more confident of course," said Li. Radwanskas win was a measure of revenge after being eliminated in the quarter-finals by Errani at this years French Open. Radwanska and Errani traded breaks virtually the entire first set before Radwanska took the tiebreaker after a smooth volley drop and wide return from Errani on set point. The two players again traded breaks in the second set until Radwanska held serve at 6-5 when Errani returned long on double match point. Radwanska closed it out in just over two hours, avoiding any repeat of their 2012 meeting at the WTA Championship -- an epic three-and-a-half hour, three-set victory for Radwanska. The 24-year-old from Krakow has played well against Errani with seven wins in nine meetings. Her only loss prior to Roland Garros was in 2006 at Budapest. There are no Canadians left in the singles draw, but Ottawa native Gabriela Dabrowski and Torontos Sharon Fichman advanced to the doubles semifinal with a 6-7 (4), 6-2, 10-5 win over the No. 1-ranked doubles team of Errani and Italian partner Roberta Vinci. "We knew we had to play big tennis," said Dabrowski. "We couldnt go out there and hope for them to make any mistakes. It was imperative today that we kept going after the ball and pressuring them." In other doubles play, Jankovic and Katarina Srebotnik of Slovenia ousted Americans Raquel Kops-Jones and Abigail Spears 6-2, 6-4, while Anna-Lena Groenefeld of Germany and Czech Kveta Peschke won 7-5, 6-2 over Julia Goerges of Germany and Czech Barbora Zahlavova Strycova Dabrowski and Fichman will meet Jankovic and Srebotnik in the semifinal. cheap nfl jerseys . According to the Baltimore Sun, the 50-year-old turned down the Orioles offer to become the clubs general manager on Tuesday. cheap nhl jerseys . McCaw was to play his 121st test and a world record 32nd against Australia -- the most by any player against a single team -- but was forced to withdraw on Friday with a tight calf muscle. http://www.cheap-nhljerseys.us.com/ . Toffoli waited for Belleville netminder Malcolm Subban to make the first move and the scored the winner at 2:02 of the fourth period. "I just got a loose puck and was lucky enough to have a chance and I out waited Subban and was happy it went in," Toffoli said. jerseys from china . Sanchez, 30, appeared in five games for the Pirates this season, and went 0-3 with an 11.85 ERA. He worked 2 1-3 innings Monday against the Brewers and allowed two runs on four hits, including two home runs. Cheap New York Islanders Jerseys . Hudson allowed one run in six-plus innings, Stephen Drew had three hits and two RBIs, and Arizona beat the struggling Florida Marlins 5-1.Got a question on rule clarification, comments on rule enforcements or some memorable NHL stories? Kerry Fraser wants to answer your emails at cmonref@tsn.ca! Hello Mr. Fraser, As the Habs posted another overtime lose Saturday night against the Pens, shouldnt the ref be taking the blame for this one? The ref was clearly on the other side of the action and was unable to see that Price had the puck tucked under his glove until the Pens forecheckers were able to hack enough until the puck was freed. Price had the puck under his glove for at least 1-2 seconds and usually with that much traffic in front of the net, or in this case, the side of the net, the play is whistled dead. Isnt there a rule that if the ref loses sight of the puck that a whistle should blown? Shouldnt the refs come out and explain their actions? Can you explain on their behalf? Danny Greenspan,Montreal, Quebec Danny: The CMon Ref mailbag was overflowing with questions relative to the overtime game winning goal scored by Kris Letang, the Max Pacioretty hit on Letang that broke his nose and even as to why Letang was allowed to return to the game with traces of blood on his jersey. Let me pick them off in order. Check out the attached viz here (video link) and here (video link) and you will see that Montreal Canadiens goalkeeper Carey Price clearly had the puck covered sufficiently for the whistle to blow. It is also obvious that the goal line referee on the opposite side of the net was unable to determine if the puck was frozen from this vantage point. No different than the rule of Real Estate its all about location, location, location. There have been times when I blew the whistle prematurely (especially early in my career) thinking that the puck was frozen only to see it squirt loose and enter the net after I had killed the play. In times like that I wanted to suck the air back out of the whistle but it was too late - the sound had already escaped and permeated the arena. From experiences like this I learned to be more patient and make sure that the puck was in fact frozen. If I was in a position on the opposite side of the net I very quickly moved around the back of the net to gain a proper sight line in a scramble around the net prior to blowing the whistle. In the two-referee system it is incumbent upon the referee at the blue line (and in this particular case on the same side of the ice with a view of Carey Price freezing the puck) to step up on the play and assist his partner by blowing his whistle at the instant the puck was dug out of the frozen grasp of goalkeeper Price and prior to a goal being scored. While somewhat unorthodox, there is precedent and guidelines for this to actually take place within the two referee system. Both referees share equal authority in all matters pertaining to the enforcement of the playing rules. The referee closest to the play does not always have the best sightline as we saw in this case. When that occurs on an infraction of the rules his partner can make a long-distance call from that vantage point to stop play and assess a penalty. When the puck is frozen down the wall on the side the back referee is standing you willl often see him stop play.dddddddddddd The same is true in the event of a hand pass or puck that has been struck with a high stick. If a goal is scored where there has been goalkeeper interference that went undetected by the referee on the goal line (often during a goal-mouth scramble) then the back referee can insert his judgment, disallow the goal and if the contact was not deemed incidental assess a penalty to the offending player. When the puck is shot by a defending player over the glass from within his defending zone there is often a huddle of officials to determine if the puck was deflected out of play prior to any assessment. With all these examples there is nothing that can prevent the back referee from stepping up and stopping the play if he sees that the puck was frozen. I called a penalty shot one night on Long Island from the blue line during a scramble around the net. My partner was on the opposite side of the net looking through the backs of multiple players attempting to find the location of the puck. I moved inside the blue line and from this vantage point opposite to my partner I clearly saw a defenseman in the goal crease pick the puck up with his hand and throw it in the corner. I immediately raised my hand, blew the whistle and assessed a penalty shot. The right call was made. When calls of this nature are made from a perceived longer distance the onus is on that back referee to be sure that he is correct but should not be avoided. While a decision will be announce sometime later today, Max Pacioretty knows firsthand the result of a devastating hit to the head. I am positive that Max feels complete remorse for his blindside hit to the head of Kris Letang. These plays must be dealt with swiftly and harshly to stop the bleeding from continuing. Speaking of bleeding, we also got a question from Andree-Anne Godin who asked why Kris Letang was allowed to return to the game with traces of blood on his jersey in violation of rule 8.3 which states, “A player who is bleeding or who has visible blood on his equipment or body shall be ruled off the ice at the next stoppage of play. Such player shall not be permitted to return to play until the bleeding has been stopped or the cut or abrasion covered (if necessary). It is required that any affected equipment and/or uniform be properly decontaminated or exchanged.” Andree-Anne, the highly skilled and professional trainers and equipment managers that each NHL team employs operate under strict guidelines regarding this issue. While there might have been a stain on Letangs jersey that you could detect, I can assure you that it was properly decontaminated with chemicals prior to his return to the game. Given the extent of his injury I was surprised to see the small amount of blood that found its way onto the neck area of Letangs jersey as he was assisted to the dressing room for treatment. I would have preferred to hear the whistle blow prior to Kris Letang digging the puck out of Carey Prices glove and putting it into the net than any concern that his jersey wasnt sanitized. I guarantee the jersey was fit for play. cheap jerseys cheap nfl jerseys ' ' '