Row breaks out over running shoes after staggering world record

Nigeria's Tobi Amusan unexpectedly broke the 100m hurdles world record in Oregon

Nigeria's Tobi Amusan is facing a barrage of questions after she destroyed the 100 meters hurdles world record at the World Championships in Eugene, Oregon.

Amusan recorded a stunning time of 12.12 seconds in her semi-final run, beating the previous women's world record set by Kendra Harrison by 0.08 seconds an