Clive Brittain, who has immense strength among his juvenile fillies, unleashed another with enormous potential yesterday in Sueboog, who made an impressive winning debut at Newbury. Backed from 7-1 to 11-2 joint favourite, the filly went clear in the final furlong. 'She's a bit smart, and I expected her to win,' Brittain said. 'She has the class to win a Group race tomorrow.' He will work Sayyedati today before deciding whether she goes for the Cheveley Park Stakes or the Prix Marcel Boussac over a mile at Longchamp on Arc day.