Less than two weeks after reconstructive right knee surgery in February 2013, Lindsey Vonn already was sounding a positive note, saying she was "really looking forward to Sochi" and defending her Olympic downhill gold medal. Along the way to the next Winter Games, though, Vonn began facing more setbacks. As shed move past one, another would surface. In the end, it was too much, even for Vonn, the most accomplished U.S. ski racer in history. Expected to be one of the biggest stars at the upcoming Games, Vonn announced Tuesday -- exactly one month before the opening ceremony -- she wont be able to race in Russia. In a Facebook posting, Vonn said she is "devastated" to miss the Olympics, "but the reality has sunk in that my knee is just too unstable to compete at this level." Her personal publicist, Lewis Kay, said in a statement the 29-year-old from Vail, Colo., will have knee surgery again "shortly." Like many in her risk-filled sport, Vonn has dealt with injuries often, particularly at major events. She withdrew midway through the 2011 world championships because of a concussion. She raced with a severely bruised shin at the last Olympics. She skipped a race at the 2009 worlds after slicing her thumb open on a champagne bottle. She hurt her knee in training and missed a pair of races at the 2007 worlds. She took a scary fall during training at the 2006 Olympics, then left the hospital to compete. "Shes come back. Shell be back," Vonns father, Alan Kildow, said in a telephone interview. "Youll see a lot of Lindsey Vonn in the future." Vonn left the 2010 Vancouver Games with two medals: the first Olympic downhill gold for an American woman, and a bronze in the super-G. She is also a four-time overall World Cup champion, by far the most recognized name in Alpine skiing at the moment -- and, as it happens, the girlfriend of Tiger Woods. Add it all up, and she would have been the focus of plenty of media coverage in Sochi, certainly a main character in NBCs coverage for a U.S. audience. "Lindsey gives you great promotional value, and shes an amazing athlete and an amazing story," said Gary Zenkel, president of NBC Olympics. "But there are amazing athletes that are going to be in Sochi, many of which we know, some of which we havent identified yet." To those in the world of skiing, theres no doubt about the sports most important athlete of late. "Without Lindsey Vonn, the races are just not the same," Canadian womens Alpine coach Hugues Ansermoz said last month. "She just attracts so much interest. When Lindsey Vonn is here, there are more people coming to watch the race, there is more interest on TV, more journalists are interested. And her relationship with Tiger Woods makes even more people interested." But Vonn has rarely been present on the elite skiing circuit the past 12 months. She tore two ligaments in her right knee and broke a bone in that leg during a high-speed crash at the world championships last February. As Vonn neared a return, she re-tore her surgically repaired ACL in a crash during training in November. After finishing 40th, 11th and fifth in a trio of World Cup races at Lake Louise, Alberta, in early December, Vonn sprained her MCL during a downhill at Val dIsere, France, two weeks later. "I did everything I possibly could to somehow get strong enough to overcome having no ACL," Vonn said Tuesday via Facebook. "Im having surgery soon so that I can be ready for the World Championships at home in Vail next February," she wrote. "On a positive note, this means there will be an additional spot so that one of my teammates can go for gold." Mikaela Shiffrin, the reigning world champion in slalom, and Julia Mancuso, a three-time Olympic medallist , will now draw extra attention as American women trying to reach the Alpine skiing podium in Sochi. Top skiers from other countries who will be favoured for medals include Germanys Maria Hoefl-Riesch, Switzerlands Lara Gut, Slovenias Tina Maze and Liechtensteins Tina Weirather. Shiffrin, the U.S. teenager labeled the "next Vonn" by some, wrote on Twitter that its "hard to swallow" that Vonn wont be competing in Sochi. Another American racer, Stacey Cook, posted on Facebook: "Our team is not the same without you. You leave big shoes to fill." After skiing in two downhills and a super-G at Lake Louise last month, Vonn sounded optimistic, declaring she would be in Sochi, "fighting for my medal." But shortly thereafter in France -- with Woods watching in the finish area -- Vonn lost her balance. Her left ski lifted, forcing weight onto her right knee. She grimaced, then clutched that leg. Kay said Tuesday an MRI "showed an MCL sprain, which coupled with the torn ACL, has made it impossible to stabilize her knee and be ready to safely ski again next month." Now Vonn will turn her attention to the 2015 world championships in Colorado. Theres also this: She needs three wins to match the World Cup record of 62 race victories set by Annemarie Moser-Proell of Austria. "I have every ounce of confidence that Lindsey will be in the starting gate next World Cup season, ready to compete," said Bill Marolt, the CEO and president of the U.S. Ski and Snowboard Association. "She knows the hard work it takes to get to the top and still has significant goals to achieve in what has been an incredible career." U.S. racers captured eight Alpine medals four years ago, their highest total at any Olympics and twice as many as any other country at Vancouver. That figure may be tough to reach with Vonn sidelined and Bode Miller, who won three medals in 2010, trying to return to form at age 36 after left knee surgery. Whats more, Mancuso has been struggling this season. Off to a poor start in pre-Olympic races, Mancuso recently headed home for a short break. "We have a strong team that is well prepared. ... Now is the time for those athletes to step up," Marolt said. Vonn, meanwhile, will go through another operation, another rehab, another road back. "You need to look at the long run. The problem with the knee is there is not an insignificant risk that youre going to do more long-term damage that cant be repaired," said Kildow, her father. "So have it repaired now. So you can compete in future years. So you can ski and enjoy yourself after you get done competing." Kevin Durant Jersey . The Flames announced Monday that Treliving, a former assistant general manager with the Coyotes, will take over the vacant GM spot in Calgary. "Im ready for this,"Treliving said. Thunder Jerseys From China . 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Womens Thunder Jerseys . 5 Trade Deadline is drawing closer and teams will be deciding on whether to buy or sell while figuring out which players can make the biggest difference and hold the greatest value.England cricket captain Alastair Cook, team-mate Stuart Broad and former England footballer Alan Shearer lead the sporting honourees in the Queens birthday honours list. Cook will receive a CBE for his services to cricket, almost five years after the MBE he was given for his performance in the 2010-11 Ashes series victory in Australia.Last month, aged 31 years and 157 days, he became the youngest player to reach 10,000 Test runs and the first Englishman to do so. Cook said: Receiving this kind of honour means a great deal to me and its also a hugely proud moment for me and my family.I also see this as recognition for my team-mates, my coaches and family and friends who have all helped me in my England career over the last 10 years - and, of course, the England fans who have always given me such fantastic support at home and abroad. England captain Alastair Cook recently passed 10,000 Test runs Broad, 29, will similarly be honoured, earning an MBE and also for his services to cricket.He said: Its an honour and a privilege to be recognised in this way. Im obviously delighted and very proud. It is a lovely moment for my family too. My parents will be delighted after guiding me into cricket and instilling me with a love of the game from an early age.Cricket has been a constant part of my life ever since and I would like to dedicate this honour to all the people that have supported me at different stages of my career. Theyve all helped me fulfil my dream of playing cricket for my country. Stuart Broad receives an MBE for services to cricket Before being dislodged by compatriot James Anderson, Broad until recently was the ICCs No 1 ranked Test bowler. He took 8-15 during the fourth Test of last summers Ashes series, one of the finest individual contributions to that series victory.Former England and Newcastle captain Shearer, 45, who was made an OBE in 2001, has been made CBE in recognition of his charitable services to the community in North East England. Alan Shearer receives a CBE for his charity work in the nnorth-east Shearer was the top goalscorer at Euro 96, when England reached the semi-finals, before joining hometown club Newcastle for a then-world record £15m and becoming their record goalscorer.dddddddddddd Rugby union Nigel Owens gets an MBE There are further MBEs for Nigel Owens, the highly respected rugby union referee from Wales, and Chelsea Ladies football manager Emma Hayes. There is an OBE for Davis Cup winner Jamie Murray Jamie Murray, the younger brother of Andy and part of Britains successful 2015 Davis Cup team, will be awarded an OBE for his services to tennis and charity, as will Davis Cup captain Leon Smith, for his services to tennis.Recently-promoted Middlesbrough Football Clubs long-serving owner Steve Gibson will also be given an OBE, for services to the economy, sport and community on Teesside, as will Welsh Rugby Union president Dennis Gethin, for his services to Welsh rugby, and retired jockey Hayley Turner for her services to racing. Claire Williams is recognised for her services to Formula One Claire Williams, the deputy team principal of Formula 1 team Williams Martini Racing, is recognised for her services to F1 Racing, and also with an OBE.There is also an MBE for agent Rachel Anderson for her services to gender equality in football, Martine Wiltshire - the sitting volleyball player and Paralympian who lost her legs in the 7/7 London bombings - for her services to sport, and England Ladies assistant manager Marieanne Spacey for her services to football.Further MBEs are awarded to UK Anti-Dopings Richard Driscoll, for his services to anti-doping in sport, and Anna Kessel, the sports journalist and co-founder of Women in Football for her services to journalism and womens sport. Also See: Cook reaches 10,000 Test runs Can Kane beat Shearer record? 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