P336 CJEFAX 2 336 Fri 28 Fed 22:20/21      OO ADVAN$B CH'SHIP, Philadelphia Grant Stafford puzzled Jim Courier with a strong return of service and aggressive net play, beating the second seed 6-3, 5-7, 6-2. "I actually filu like I played WK tonight," said Courier, the seventh seeded plazet to fall before the quarterfinals. Stafford took the first set easily b for Couri fo d his s tv o t n enough to rally from do{n 3-0. No 1 Pete Sampras iu the o&ly remaining sjid in the Advanta. RESULTS ROUND-UP ON PAGE 339 Football 302 Letters 356 Cricket 3  Tens n w Milan R lt Main Min