Olympic sprint gold medalist Asafa Powell is to appeal her doping suspension . Simpson 's agent Asafa Powell calls the 18-month ban `` incredibly unjust '' Simpson tested positive for banned stimulant oxilofrine at Thursday Jamaican trials . A ruling in the case of fellow Jamaican sprinter Simpson is expected on Thursday .
Olympic sprint gold medalist Sherone Simpson is to appeal her doping suspension . Simpson 's agent Paul Doyle calls the 18-month ban `` incredibly unjust '' Simpson tested positive for banned stimulant oxilofrine at last year 's Jamaican trials . A ruling in the case of fellow Jamaican sprinter Asafa Powell is expected on Thursday .