Flushing Meadows, NY (Sports Network) - American 17-year-old qualifier Victoria Duval scored a monumental upset on Tuesday by beating 2011 champion and No. 11 seed Samantha Stosur in the first round of the U.S. Open Tuesday. Duval, who was playing in only her second grand slam match, posted a 5-7, 6-4, 6-4 win, which was only completed on her fourth match point. Stosur committed 56 unforced errors and had 10 double faults. A forehand winner sent Duval into the air in jubilation before the celebratory crowd at Louis Armstrong Stadium. "The crowd helped me a lot today. I know Sam is a great champion and I watched her when she won the U.S.Open," said Duval, who won her first match against a top-20 opponent. "I know she didnt play her best today." The story of Duvals rise to professional tennis is an eye-opening one. Although she was born in Miami, Duval spent her childhood in Haiti until the age of eight before moving back to the U.S. She started playing tennis a year before her move. Duvals parents are Haitian. Her father, who is a doctor in Port-au-Prince; was hurt in the devastating earthquake of 2010. Her mother was a professional ballet, jazz and tap dancer. Last year at this time, Duval was the recipient of the Maureen Connolly "Outstanding Player" award at the USTA Girls 18s National Championships. She will take on Slovakian Daniela Hantuchova in the second round. Hantuchova beat American wild card Maria Sanchez, 7-5, 6-2. "Theres a lot to be thankful for. You never know what could happen any day," Duval said. "Take everything I learned today and hopefully I can play like this again." Fourth seed Sara Errani, former world No. 1 Caroline Wozniacki and 2011 Wimbledon champion Petra Kvitova were among the opening-round winners Tuesday. Second seed Victoria Azarenka was set to play Germanys Dinah Pfizenmaier in the final night match at Arthur Ashe Stadium. The former world No. 1 Azarenka is the reigning Australian Open champ and was last years U.S. Open runner-up to the great Serena Williams. The former French Open runner-up Errani, of Italy, double-bageled helpless Aussie Olivia Rogowska, 6-0, 6-0, while the sixth-seeded Dane and 2009 U.S. Open runner-up Wozniacki topped Chinese Duan Ying-Ying, 6-2, 7-5, and the seventh-seeded Czech slugger Kvitova got past Japanese fellow left-hander Misaki Doi in three sets, 6-2, 3-6, 6-1, in 1 hour, 55 minutes on a warm, breezy Day 2 at the USTA Billie Jean King National Tennis Center. "In the first round of Grand Slams its difficult all the time so you have to be focused," said Kvitova, who was a runner-up in New Haven, Conn., last week. "I didnt play my game all the match. I didnt have focus. I have to have more confidence." Kvitova, who captured Wimbledon in 2011, has never made it past the fourth round in New York. Her second-round opponent on Thursday will be capable Serb Bojana Jovanovski. Meanwhile, 10th-seeded Italian Roberta Vinci, a U.S. Open quarterfinalist a year ago, handled Hungarian Timea Babos, 6-4, 6-2, 13th-seeded former world No. 1 and former French Open champ Ana Ivanovic, also a 2012 quarterfinalist in Flushing, pasted Georgian Anna Tatishvili, 6-2, 6-0, and 14th-seeded Russian Maria Kirilenko mauled Belgian Yanina Wickmayer, 6-1, 6-1. In other action involving seeds, Ukrainian Elina Svitolina drove out No. 17 Slovak Dominika Cibulkova, 6-4, 6-3; Israeli Julia Glushko doused No. 20 Russian Nadia Petrova 6-3, 6-4; and No. 21 seed Simona Halep of Romania upended Great Britains Heather Watson, 4-6, 6-4, 6-2. Halep is fresh off her title in New Haven and has won four events over the past two months. No. 22 Russian Elena Vesnina drilled German Annika Beck 6-1, 6-1; No. 26 Alize Cornet, of France, downed Portuguese Maria Joao Koehler 6-3, 6-2; No. 27 Svetlana Kuznetsova of Russia beat American Mallory Burdette, 6-3, 7-5; 28th seed Mona Barthel of Germany topped Swede Johanna Larsson, 6-1, 6-4; and Taipeis Su-Wei Hsieh knocked out No. 31 Czech Klara Zakopalova 6-3, 6-3. The one-time world No. 3 Petrova has dropped her last six matches on tour. Kuznetsova was the 2004 U.S. Open champion and 2007 runner-up. In other matches involving Americans, Christina McHale defeated German Julia Goerges, 6-4, 6-3; 18-year-old Sachia Vickery made her WTA debut by topping Croat Mirjana Lucic-Baroni, 6-4, 6-4; Italian Karin Knapp drilled Grace Min, 6-3, 6-1; Romanian Alexandra Dulgheru took out Varvara Lepchenko, 6-7 (5-7), 6-2, 7-6 (7-5); Alison Riske ousted Bulgarian Tsvetana Pironkova, 6-3, 6-3; and Flavia Pennetta crushed Nicole Gibbs, 6-0, 6-2. 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Hamilton signed offensive linemen Mike Filer, Joel Reinders, Landon Rice and Carson Rockhill.Hamilton, ON - The Calgary Stampeders will attempt to keep pace atop the West Division standings this afternoon when they travel to Ron Joyce Stadium to take on the struggling Hamilton Tiger-Cats. The Stamps have come storming out of the gate this season with wins in five of their first six games, which has them tied for first place in the West with Edmonton. After suffering its first loss of the season on Aug. 1, Calgary bounced back at home last Saturday with an easy 38-17 victory over Ottawa, and now it heads back out on the road looking to win its third straight away game. You can watch the game live today on TSN starting at 2:30pm et/11:30am pt. Hamilton has undoubtedly been one of the most disappointing teams in the CFL this season. A season removed from an appearance in the Grey Cup Final, the Ticats have floundered, opening up just 1-5. Their 36-29 loss to British Columbia on Aug. 8 was their second consecutive setback (and their fourth this season coming by seven points or fewer), but the silver lining is that they are situated in the much-inferior East Division, where they are only a game and a half behind Toronto (3-4) for first place. The teams squared off in Calgary back on July 18, with a fourth-quarter field goal lifting the Stamps to a 10-7 victory, their fifth straight win over the Ticats. Calgary won last weeks contest fairly easily behind another outstanding performance from Bo Levi Mitchell, who threw for 289 yards and three touchdowns while rushing for another major. The third-year signal caller has been excellent this year, completing 62.8 percent of his passes for 1,421 yards. Hes also tied for the league lead in touchdown passes (11) and has tossed only two interceptions. Marquay McDaniel was Mitchells preferred receiving target last week, hauling in nine passes for 117 yards and a touchdown. McDaniel now has 24 receptions for 308 yards and three scores on the season, and he and Jeff Fuller (23 receptions, 307 yards, four TDs) make up a formidable receiving duo. The Stamps do not feature a true lead back but instead get solid production from a rotation of rushers. Matt Walter (139 yards) and Jock Sanders (136 yards) have earned the most work, while Martell Mallett (132 yards) has been the most explosive with 7.8 yards per carry. While Calgarys offensive production ranks in the middle of the CFL pack (341.2 ypg), it has shined on the defensive side of the ball, ranking third in allowing just 321.6 ypg, which includes the top-ranked passing defense (198.2 ypg). Brandon Smith anchors the unit in the defensive backfield, as he ranks second inn the CFL in tackles with 32.dddddddddddd Linebacker Juwan Simpson has also been a solid stopper with 22 tackles. Joining Smith in arguably the leagues most talented secondary are Joshua Bell and Fred Bennett, who have both collected a pair of interceptions on the young season. Leading the pass-rush is Charleston Hughes, whose six sacks ranks second in the league behind only John Chick of the Roughriders (nine). Freddie Bishop III, Micah Johnson and Simpson also have multiple sacks. Hamiltons lackluster season has been well-represented in the league standings, as its total offense (331.5 ypg) and total defense (374.2 ypg) both rank eighth in the league. Dan LeFevour was solid under center in last weeks loss, completing 23-of-34 passes for 298 yards, while also turning nine carries into 103 yards and a touchdown. The Ticats appear to have found their answer at quarterback after Jeremiah Masoli (14-of-35, 225 yards, TD, two INTs) and Zach Collaros (23- of-41, 212 yards, TD, two INTs) both struggled early in the season. LeFevour also has more interceptions (three) than touchdown passes (two), but he has completed more than 67 percent of his passes is an outstanding threat out of the pocket with 272 rushing yards and four majors. Samuel Giguere showed outstanding big-play ability last week by racking up 130 yards on just three receptions, upping his yearly totals to 16 catches for 248 yards in the process. Rounding out the deep group of pass-catchers are C.J. Gable (30 receptions, 138 yards, two TDs), Luke Tasker (17 receptions, 208 yards, TD) and Cary Koch (13 receptions, 199 yards). The Ticats running backs were lost in the gameplan against BC their last time out, rushing just three times for -3 yards. Gable is typically a solid rusher, as hes added 30 carries for 138 yards and two scores to his impressive receiving totals. Defensively, Hamilton has allowed 28.6 ppg in the three contests since allowing only 10 points to Calgary last month. Simoni Lawrence is in the midst of a breakout campaign at linebacker, as his 31 tackles ranks third in the league and is already more than halfway to his career high of 52 set last season. Rico Murray has also been solid at linebacker, collecting 18 tackles while picking off two passes. Hamiltons pass-rush has been virtually non-existent. The defense has just three sacks in six games, with Bryan Hall recording two of those. As the last line of defense, Brandon Stewart (22 tackles) and Emanuel Davis (20 tackles) have been put to the test on a defense that gives up the most passing yards per game (278.8). ' ' '