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| ('bbc.com/sport/athletics/23310347', 1)  | Former world champion Tyson Gay , from America , and Jamaica 's ex-100m world record holder Asafa Powell , both 30 , >>>have tested positive for banned drugs<<< .                                                                                                                     |
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| ('bbc.com/sport/athletics/23322223', 2)  | After >>>sprinters Tyson Gay and Asafa Powell tested positive for banned drugs<<< , Boldon said : " An athlete does not have a degree in pharmacology . "                                                                                                                              |
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| ('bbc.com/sport/athletics/23332737', 3)  | His absence follows the >>>withdrawal of sprinter Tyson Gay<<< from Moscow after failing a drugs test .                                                                                                                                                                                |
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| ('bbc.com/sport/athletics/23337067', 7)  | Tyson Gay ( 9.75 secs ) , Asafa Powell ( 9.88 ) - >>>who it was this week revealed have both failed drugs tests<<< - and Justin Gatlin ( 9.89 ) are the only sprinters to have covered the distance quicker in 2013 .                                                                  |
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| ('bbc.com/sport/athletics/23342680', 0)  | Asafa Powell 's trainer Chris Xuereb says he should not be a " scapegoat " for the former 100m world record holder 's >>>positive drugs test<<< .                                                                                                                                      |
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| ('bbc.com/sport/athletics/23367299', 0)  | American sprinter Justin Gatlin says he still believes in the credibility of athletics despite >>>Tyson Gay and Asafa Powell failing drug tests<<< .                                                                                                                                   |
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| ('bbc.com/sport/athletics/23371204', 3)  | Compatriots >>>Asafa Powell<<< , Sherone Simpson , Veronica Campbell-Brown and fellow discus thrower Allison Randall have also recently failed dope tests .                                                                                                                            |
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| ('bbc.com/sport/athletics/23394789', 1)  | The double Olympic champion 's claim comes after sprinters >>>Tyson Gay and Asafa Powell provided positive samples<<< .                                                                                                                                                                |
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| ('bbc.com/sport/athletics/23443185', 5)  | >>>Powell and American sprinter Tyson Gay 's failed drug tests<<< were made public 10 days ago and both are now awaiting the results of their B samples .                                                                                                                              |
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| ('bbc.com/sport/athletics/23449733', 2)  | >>>Asafa Powell and Sherone Simpson recently tested positive , as did American Tyson Gay<<< , the fastest man in the world this year .                                                                                                                                                 |
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| ('bbc.com/sport/athletics/23605334', 7)  | Athletics has had to deal with a series of doping revelations recently , with news that two of the fastest four 100m men of all time - Tyson Gay and Asafa Powell - had failed drug tests breaking >>>on the same day last month<<< .                                                  |
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| ('bbc.com/sport/athletics/23621134', 4)  | Athletics has had to deal with a series of doping revelations recently , with news that two of the fastest four 100m men of all time - >>>Tyson Gay and Asafa Powell - had failed drug tests on the same day last month<<< .                                                           |
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| ('bbc.com/sport/athletics/23631071', 20) | Team captain Christine Ohuruogu , who competes in the 400m heats on Saturday , admitted the >>>positive tests of Tyson and Powell last month<<< were a " dark day " for the sport , but insisted it did not overshadow the championships .                                             |
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| ('bbc.com/sport/athletics/23636561', 12) | There have been a number of high-profile doping incidents recently , with >>>former 100m world champion Tyson Gay and Jamaica 's ex-100m world record holder Asafa Powell both failing drug tests<<< .                                                                                 |
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| ('bbc.com/sport/athletics/23643267', 38) | Dasaolu 's 9.91 in Birmingham was his sixth personal best in his first seven races indoors and outdoors this year , but just 24 hours later his feat was overshadowed by the news >>>Tyson Gay and Asafa Powell<<< , two of the four fastest men of all time , had failed drug tests . |
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| ('bbc.com/sport/athletics/24181107', 4)  | Former world champion Tyson Gay and ex-100m world record holder Asafa Powell >>>both tested positive for banned substances<<< ahead of the championships .                                                                                                                             |
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| ('bbc.com/sport/athletics/27700151', 1)  | American Gay , 31 , will run in the 100m at the Lausanne Diamond League event on 3 July , his first competition since he was >>>suspended after testing positive<<< for a banned anabolic steroid .                                                                                    |
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| ('bbc.com/sport/athletics/28957864', 6)  | Former world record holder Asafa Powell and ex-world champion Tyson Gay , both of whom >>>returned from drugs bans<<< this summer , finished fourth and ninth respectively in a high-quality field .                                                                                   |
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| ('bbc.com/sport/boxing/23418833', 16)    | >>>Jamaican sprinters Asafa Powell and Sherone Simpson tested positive for the same stimulant<<< following their national trials last month .                                                                                                                                          |
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| ('bbc.com/sport/wales/23322036', 1)      | The Welshman was responding to reports that sprinters Tyson Gay of the US and Jamaica 's Asafa Powell had >>>tested positive for banned drugs<<< .                                                                                                                                     |
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| ('bbc.com/sport/wales/23596454', 1)      | His comments come after >>>sprinters Tyson Gay and Asafa Powell failed drug tests<<< leading up to the World Championships in Moscow in August .                                                                                                                                       |
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