Marksmanship fails in Tercentenary Stakes The Aidan O'Brien trained Marksmanship failed to justify 100/30 favouritism, finishing a staying on but never dangerous seventh to Pisco Sour in the Tercentenary Stakes at Royal Ascot today. Pisco Sour was completing a double for trainer Hughie Morrison, having won the previous race with Sagramor. It was the first boost for the Investec Derby form as Pisco Sour ran ninth behind Pour Moi at Epsom.
