ISTANBUL, Turkey -- Top-ranked Serena Williams breezed past Angelique Kerber 6-3, 6-1 to open her bid for a fourth ATP Championships title on Tuesday. Nick Leddy Jersey . Williams, the defending champion, had no trouble against Kerber, who also lost to the American 6-4, 6-1 in the round-robin at this event last year. Kerber was the only player to beat Williams last year - in Cincinnati - after the Americans first-round ouster at the French Open. "Today she was playing unbelievable, and I had actually no chance. I mean, she was serving great and also returning unbelievable," Kerber said. "So I was just giving all I could, but yeah, its tough to play against Serena like this." Williams was particularly effective with her backhand return, the shot she also used on her first match point. Kerber, who had two straight double-faults to surrender the first game of the second set, produced another to give Williams three match points. Although she is 32, considered a ripe age in tennis, Williams is enjoying the finest season in her career, having already won 10 titles. She added the French Open and U.S. Open titles to bring her Grand Slam record to 17 championships and is 74-4 for the year. Earlier, second-ranked Victoria Azarenka overcame an erratic performance to beat an ailing Sara Errani 7-6 (4), 6-2 in the opening match of tournament. "I was a little rusty at the beginning. I think its a little bit expected after a break, and playing right away against a top player always makes it a little bit difficult," Azarenka said. Williams, making her eighth appearance in the event, is looking to become the first player to successfully defend the title since Justine Henin in 2007. If she achieves the feat, she would equal Chris Evert for third most WTA Championships with her fourth. Henin was also the last to win 10 titles in a season, in 2007. Williams has clinched the year-end No. 1 ranking for the third time in her career after 2002 and 2009. Errani hurt her right calf in the third game of the second set and took a medical timeout to have it treated. Several times after that she seemed to be bothered by the injury and to favour her right leg, although she returned after the medical timeout to break Azarenkas serve to level at 2-2. She did not win another game though. "In the tiebreaker I felt a pain in my calf on serve," Errani said. "The first set was very tough, very long. I was running a lot." Errani served for the set three times -- and dropped serve each time as both players produced sloppy play with little rhythm. Azarenka, the Australian Open champion, managed to hold her serve only once through the first eight games but seized her chance when it came. She won four straight points in the tiebreaker to take a 5-3 lead, then faltered when she served her sixth double-fault. But an error by Errani gave Azarenka two set points. Errani then committed a double-fault and Azarenka had the set. "I think, overall was important to take that first set. It was a big turnaround point," Azarenka said. Azerenka, who was runner-up in the event in 2011 and a semifinalist last year, finished with eight double-faults but she also had 51 winners for Erranis 28. Azarenkas win was her first since losing the U.S. Open final to Serena Williams. Azarenka lost both of her opening matches in Tokyo and Beijing, where she had 15 double-faults. The tournament brings together the top eight players in the world. Third-ranked Maria Sharapova dropped out with a shoulder injury. The players are split onto two round-robin groups, with the top two finishers from each pool advancing to the semifinals. Christopher Gibson Jersey .com) - Houston Texans interim head coach Wade Phillips confirmed Monday that starting quarterback Case Keenum sustained a sprained right thumb during Sundays 25-3 loss in Indianapolis. Nikolay Kulemin Jersey . He was set to become an unrestricted free agent on July 5th. The 34-year-old Laval, Que. native has played six seasons with the Penguins. http://www.islandersauthority.com/authentic-mike-bossy-islanders-jersey/ .com) - Minnesota Vikings running back Adrian Peterson lost an appeal to have his indefinite suspension overturned, the NFL announced Friday. MINSK, Belarus -- Defending champion Sweden blanked the Czech Republic 3-0 Sunday to earn the bronze at the ice hockey world championship. Joakim Lindstrom scored early and Simon Hjalmarsson netted another one in the opening period for Sweden to take control. Mikael Backlund rounded off the win with a wrist shot past goaltender Alexander Salak in the third. "We came here to win the gold," Lindstrom said. "That was our goal. But the competition is very, very hard, and all in all it was a pretty good tournament for us." Sweden had to settle for the third-place game after a 3-1 loss to Russia in the semifinals. The Czechs outshot Sweden 29-24 but failed to score for the second straight match after Finland blanked them 3-0 in Saturdays semis. Goaltender Anders Nilsson saved all 24 shots for the shutout. Dennis Seidenberg Jersey. "Hes been phenomenal, not just tonight, but the whole tournament," Lindstrom said. "From game one, hes been our backbone on this hockey team." The Czechs -- the 2010 champions -- struggled in the preliminary round, recording three losses before recovering to eliminate the United States in the quarterfinals. Veteran forward Jaromir Jagr said after the game it was his last with the national team -- although he will continue playing for his New Jersey Devils next season. "Its not that I would think Im not good enough for it," Jagr said. 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