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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 Cheap Basketball Shoes Authentic . -- The Sacramento Kings and guard Jimmer Fredette have completed a buyout of his contract, clearing the way for the former BYU sensation to become a free agent. Wholesale Basketball Shoes Fast Shipping .com) - Guard Greivis Vasquez and forward Patrick Patterson, two key pieces to the Toronto Raptors run to an Atlantic Division title in 2013-14, were both given qualifying offers by the team on Saturday. http://www.clearancebasketballshoes.com/ .com) - The Los Angeles Dodgers made it official Tuesday and signed pitcher Brandon McCarthy to a four-year contract. Clearance Basketball Shoes Store . The 55th-ranked Istomin saved 11 of 14 break points to win in just over two hours, setting up a second round meeting with Australian Marinko Matosevic. It was the Uzbeks third win in three matches against fifth-seeded Kohlschreiber, the 2007 and 2012 tournament winner. Discount Basketball Shoes . The right-hander pitched into the seventh inning and boosted Cincinnatis struggling offence by hitting a double and scoring as the Reds ended a seven-game losing streak by beating the Atlanta Braves 1-0 Saturday night.Paris, France (SportsNetwork.com) - Plagued by a right forearm injury, former runner-up Jo-Wilfried Tsonga decided to pull out of the upcoming Australian Open. The world No. 12 French star struggled with the injury during Frances loss to Switzerland in Novembers Davis Cup final. He then played in the International Premier Tennis League, a franchise-based exhibition competition in Asia and the Middle East. Tsonga withdrew from the Hopman Cup this week because of pain in the arm and said he is still suffering from a forearm inflammation that prevents me from being at 100 percent of my capacities in a competition.dddddddddddd The 2008 Aussie runner-up Tsonga said he will need three more weeks of treatment before returning to action. The 2015 Aussie Open will begin January 19 in Melbourne. ' ' '