Persica galloped on strongly from the front under Sean Levey to land the Hong Kong Jockey Club Lester Piggott Handicap at Epsom.
Richard Hannon's charge was pressed by Portsmouth at the furlong pole after Oisin Murphy made a daring dart up the inside rail on the 5-2 favourite.
However, 9-2 shot Persica readily pulled out more when required to ultimately run out a convincing victor by two and a quarter lengths.
