Stefan Denifl is the second rider charged with professional fraud in Operation Aderlass blood doping case Cycling by el-admin - September 24, 2019 0897 Stefan Denifl on his way to victory on stage 17 of the 2017 Vuelta a España (Photo: Yuzuru SUNADA) Stefan Denifl is the second rider to be charged with fraud in the wake of the Operation Aderlass blood doping ring. Share this: Doctor at centre of Operation Aderlass doping scandal jailed by German court DateJanuary 15, 2021In relation toCyclingBahrain-Merida fire rider and sports director over Operation Aderlass doping scandalDateOctober 11, 2019In relation toCyclingUAE Team Emirates rider banned for four years over Operation Aderlass doping scandalDateNovember 13, 2019In relation toCycling