11/06/2003 12:00AM

Magritte appears vulnerable

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On Saturday, Magritte will attempt to give Aidan O'Brien his third straight victory in the Group 1 Criterium de Saint-Cloud.

At 1 1/4 miles, the $171,000 contest for juvenile colts and fillies will be a severe test of stamina in boglike conditions.

Magritte was the handy winner of a Tipperary maiden race in his debut, but was only third of four in American Post's Racing Post Trophy. He could be vulnerable to more experienced rivals.

Cohn Blue won a Leicester allowance and was second in the listed Zetland Stakes at Newmarket, both at the Criterium distance, while Islero Noir has won a 1 1/8-mile allowance at Maisons-Laffitte.

Simplex looks dangerous coming off a one-mile conditions race score at Longchamp.