SAN MATEO, Calif. - Trainer Lloyd Mason was glad to welcome Tight Circle to his barn after claiming the 3-year-old filly for $20,000 from her U.S. debut on Sept. 18. She won that race, a 5 1/2-furlong sprint, by a head after stalking the pace, and Mason wheels her back quickly Sunday at Bay Meadows in a first-level allowance sprint at six furlongs. The British-bred Tight Circle has four opponents Sunday and will meet older for the first time.