As part of a series looking at the mind, body and soul of an athlete, ESPNs Prim Siripipat will speak to various tennis players throughout the US Open.NEW YORK -- A year ago, Roberta Vinci pulled off one of the most epic upsets in US Open history.The No. 43-ranked Italian stunned No. 1 Serena Williams in the semifinals, ending Williams 33-match winning streak in majors -- and her quest for the first calendar Grand Slam since Steffi Grafs feat in 1988.After the match, Vinci was emotional, calling it the best moment of her life. Beforehand, it was a much different story. Did she really believe she could beat Williams heading into it?No. Really! No ... Vinci said in her on-court interview. When I woke up, I said OK, I have the semifinals today. Try to enjoy it. Dont think about Serena. Play.Although it was a painful defeat, Serena acknowledged the 12-1 underdog played her heart out.I thought she played the best tennis in her career, Serena said. Actually, I guess its inspiring. But, yeah, I think she played literally out of her mind.Added Vinci: The power of the mind and the mental game is important for this kind of sport.This past Wednesday, that positivity was evident again when Vinci, 33, was down a break in the second set of her second-round match.With American Christina McHale, 24, leading 3-2, the now No. 7 seed maintained her focus and turned a difficult moment into an opportunity. Vinci won four straight games on her way to a 6-1, 6-3 victory.Vinci faced another test of will Friday in her three-set win over Carina Witthoeft, 21, of Germany. Despite dropping the second set, the Italian kept her concentration and made only five unforced errors in the third set, winning 6-0, 5-7, 6-3.Up next in the fourth round, she will face Lesia Tsurenko of Ukraine.Indeed, it was the fiery Italians mind that enabled her to take down the most intimidating player on the WTA Tour in Serena Williams last year.She offered espnW these mental tips on how to handle a daunting opponent:1. Forget your opponent.Dont think about whos on the other side of the net. Forget their name. Forget their ranking. Forget their résumé and who theyve beaten. Shift your focus from your opponent to you. Think about your game, Vinci said. Dont think about the opponent. Just play your game and be aggressive.2. Focus on your breath.As in yoga teaching, breathing helps a player stay in the present moment, which prevents them from thinking about past mistakes or looking too far ahead into the match. Slow, deep breaths also help with nerves and pressure, which happens to all players.When asked how often she gets nervous, Vinci said, Always. I always feel the pressure. Im always nervous ... every single match and especially at the beginning. Then, step by step, I try to calm down, focus and the pressure gets low, and then I get back into the match.3. Forget about the future.This means dont worry about winning or losing. Yes, as a competitor, of course you want to win. However, getting too wrapped up in results can cause more stress and cause an athlete to lose focus on the things that will help them earn a victory.Stay focused every single point and dont think about the results, Vinci said. Just play your game.4. Think positive.Her belief may have fluctuated, but Vinci stayed positive throughout the entire match regardless of what was happening.With that said, it begged the question to ask Vinci one more time about the trust in herself. Did she really not believe she could beat Williams? Not even a little bit?OK, a little bit. A little bit ... yes, Vinci said.Just a little bit of belief. Thats all it takes.Prim Siripipat joined ESPN as an anchor in 2011 after spending three years in Miami covering the Dolphins, Heat and Marlins. She has appeared on SportsCenter, First Take, NBA Tonight and ESPN Radio. She played tennis at Duke University and, shortly after, began a career in broadcasting in Raleigh, North Carolina. Follow her on Twitter @ESPNPrim. Fake Jordan 1 Black . On Mar. 16, coming off a "fight of the year" performance at UFC 154 the previous November, St-Pierre faced Nick Diaz at UFC 158 in what would be his eighth defence of the welterweight title. Using his superior athleticism, St-Pierre cruised to a five round, unanimous decision victory setting up a much-anticipated title defence against number one contender Johny Hendricks. Cheap Jordan 1 High . -- If Henry Burris has his way, he will be the starting quarterback to lead the Hamilton Tiger-Cats back to the Grey Cup next year. http://www.bestfakejordan1.com/ .2 billion agreement with Rogers Communications for the leagues broadcast and multimedia rights. Retro Air Jordan 1 OG Chicago White Mens . It was hard for Luck to pull off another comeback, or even get into the end zone, while standing on the sideline. Rivers threw a 22-yard touchdown pass to rookie Keenan Allen and Nick Novak kicked four field goals to give the Chargers a 19-9 victory against the Colts on Monday night. Jordan 1 Bred Replica . Ashley Youngs cross was inadvertently headed by Chester into his own net in the 66th minute, allowing United to claim a third straight league win. "We had to dig deep with our fighting spirit and weve done that," United striker Wayne Rooney said. Did that really just happen?Yes, Notre Dame, you really are 2-5 after failing to beat a?Christian McCaffrey-less Stanford. Clemson, youre amazingly still undefeated because NC State cant make a field goal. West Virginia is also perfect on the season and might start to gain a few believers. And the race for the Group of 5s New Years Six spot is getting crowded.dddddddddddd.Its time to examine the Week 7 takeaways and determine if these things are for real or soon will be proven imaginary. ' ' '