Liverpool defender Mamadou Sakho is set to respond on Tuesday to UEFAs investigation into his alleged anti-doping violation. Sakho sat out Saturdays 2-2 draw with Newcastle after it emerged shortly beforehand that UEFA was investigating an alleged anti-doping violation - understood to be associated with a fat-burning supplement - following the Europa League tie at Manchester United last month.The France international, who has not been suspended either by Liverpool or UEFA, faces an anxious wait to see whether he will receive a playing ban. He is likely to ask for his B sample to be tested, with the deadline for that request set for Tuesday. Sakho is believed to have used a fat-burner Sky Sports Jamie Carragher, a former Liverpool defender, has hit out at Sakho.Carragher said: Its a nightmare for the player. I think hes let himself and his club down badly, because he was becoming a really important player for Liverpool.There are serious questions to be asked of him.Hes had a great campaign. Hes one of the leaders of the team now. You think of the Borussia Dortmund game, the Manchester United games especially, how well he played in those. Its now how Liverpool fill that void. Carragher on Sakho Jamie Carraghers view on Mamadou Sakho But for a professional footballer - or any sportsman, really - its not acceptable.Sporting Integritys founding director Michelle Verroken told Sky Sports News HQ that using fat-burners carries huge risks.She said: If you are increasing the heart rate the important thing to know is what you are also going to be doing - if you are exercising at the same time - because you are overloading the heart and that really would not be a good thing if your heart has some congenital problem or you are demanding more of your body without proper hydration, proper food. Former Liverpool defender Jamie Carragher believes Mamadou Sakho has let everyone at Liverpool down Some of these fat burners even contain a diuretic to take water out of the body and literally make your body appear smaller. And again, if you are trying to dry out the body when you are involved in intense exercise, there are really big risks in terms of cardiovascular problems.Verroken is not convinced fat-burners improve performance though, and she believes there are alternative means available which are less dangerous.She said: Its a difficult question really, because if your intention is to improve your performance, I think there are far better ways of trying to do this. Also See: Carragher on Sakho Huge risks of fat-burners Toure backs Sakho Sakho probed Stitched Adidas NHL Jerseys . Anthony Calvillo, through 20 CFL seasons, was frequently invincible and largely stoic in the heat of competition. But underneath the professional exterior he was, and is, compellingly human. Cheap NHL Jerseys Authentic . LOUIS -- St. http://www.cheapnhljerseysfreeshipping.com/ . In what the team had called a retirement, Ryan said Thursday that he is resigning as chief executive of the Rangers in a move effective at the end of this month. Cheap NHL Jerseys China . -- Sergey Tolchinksy scored his second goal of the game 3:56 into overtime as the Sault Ste. Cheap Hockey Jerseys . But the quarterback hopes to stay involved in football after officially calling it quits Tuesday. "Id love to look at those opportunities as they arise," Pierce said in an interview from his Winnipeg eatery. RIO DE JANEIRO -- Anthony Ervin finally has an Olympic gold medal to replace the one he sold 16 years ago.The 35-year-old American won the mens 50-meter freestyle at the Rio Games on Friday, capping a night of upsets in the pool.Ervin improbably touched first in 21.40 seconds -- a hundredth of a second ahead of defending champion Florent Manaudou of France. Teammate and former training partner Nathan Adrian claimed bronze.Its surreal, kind of absurd, Ervin said. When I touched and turned around and saw the `1 next to my name, I kind of smiled and laughed.Katie Ledecky, his 19-year-old teammate and multiple gold medalist, marveled at Ervins feat.Wow, who does that, winning 16 years apart? she said. Thats like me winning gold in London and then not winning an individual gold medal until 2028. Hes taken such a leadership role and it definitely rubs off on everybody.It didnt come easily.At the 2000 Sydney Games, Ervin tied teammate Gary Hall Jr. for gold in the 50 free, making him one of the sports rising stars. But he stunningly walked away in 2003, burned out on swimming and seeking to find a deeper meaning to life. He auctioned off his gold medal for $17,100 and donated the proceeds to help victims of the 2004 Indian Ocean tsunami. Ervin readily admitted he lost his silver from the 400 free relay in Sydney.Ervin returned to make the American team in 2012, but finished fifth in the 50.Hed fallen in love with the sport again, thriving on the love of family, friends and teammates, who at times over the years since Sydney had no idea where he was in the world. Ervin broke away from the winners stroll on deck to share wild hugs with his brother and his ride or die friends, the bam-bam fam.If Ive achieved anything great, its because I was upon their shoulders and they lifted me up, he said.Erviin is easily identifiable in the splash-and-dash race by his sleeve of tattoos on each churning arm.dddddddddddd He turns interviews into a discussion on everything from philosophy to Biblical parables. Earlier this year, he detailed his lifes adventures, including drugs and sex, in a book called Chasing Water: Elegy of an Olympian.This is a guy who lists rock star as his future professional aspiration in his USA Swimming biography.Ervin revealed a surprise after his win: he became a father during the U.S. trials last month. He had planned on attending his daughters birth, but he was still at the meet and then got caught up in Olympic preparations.Oh man, its like a thunderbolt, he said, declining to reveal her name. I havent had a chance to meet her yet and I tried to send a message to her after my race.After leaving the sport in 2003, Ervin spent eight years working odd jobs, moved from California to New York and then back again, and finished his college degree at California. In Berkeley, Ervin was coaching young kids at the pool when he rediscovered his love of the sport that remains to this day.Unlike many swimmers who focus on getting their hand on the wall first, Ervin favors an intellectual approach.You just think about trying to swim the race that you imagine you can do, he said. Maybe it starts as a dream and then its a plan. You plan to do something and you start testing that plan. I dont think my age should limit me and I dont think fear of defeat should limit me either.The gold medal hung around Ervins neck, seemingly more comfortably than it did in Sydney, when he was 19 and restless.Im keeping it for now, he said. Who knows what the future holds? 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