American world indoor 60m favourite Ivory Williams has withdrawn from this weekend’s IAAF championships because of a positive test for marijuana, his manager said on Wednesday. “He had a marijuana positive,” Ray Flynn said in a telephone call from the United States. “To the best of my knowledge it was at the US championships,” Flynn added. With the positive, Williams was... 

European champion Dwain Chambers ran the fastest 60 meters this year at the British trials Saturday to qualify for the world indoor championships. Chambers, who won silver at the world indoors two years ago, clocked 6.50 seconds in Sheffield as he prepares for next month’s event in Doha, Qatar. The 31-year-old Chambers says he is more relaxed as memories fade of his two-year doping ban for using...