Frankie Dettori faces tactical headache on Derby favourite English King

Jockey’s mount will race from the unfavoured stall oneNo Derby winner has come from No 1 draw since 1999Frankie Dettori will face one of Epsom’s most demanding tactical challenges for the first time in his career on Saturday after the draw for the Derby placed his mount English King, the favourite, in stall one, on the outside of a 16-strong field as they turn right and uphill in the early stages of the race.English King will be Dettori’s 25th ride in the Derby as he looks for