Four-year-old filly Chalon, making her first start for trainer Arnaud Delacour after owners Roy and Gretchn Jackson (Lael Stable) purchased her at auction for $550,000 last fall, won the $100,000 Primonetta by about one length over Cairenn just now at Laurel Park. Chalon, a very good 3-year-old filly sprinter last year, ran six furlongs in 1:09.44 and paid $3.60 winning under Paco Lopez.