Nigeria’s Tobi Amusan failed to defend her World Athletics Championship title after finishing sixth in Thursday’s final in Budapest. Amusan returned in a time of 12.62s which was not enough to earn her a place on the podium. Amusan was dethroned by 2015 champion Danielle Williams of Jamaica who won the gold after clocking a season best of 12.43s. Puerto Rico’s Jasmine Camacho-Quinn won the silver…