Tennis Australian Open 1981 at Melbourne (aus) Men: Singles December 26-January 4: Quarterfinals: Peter McNamara (aus) * - Peter Rennert (usa) 7-6 5-7 6-2 6-7 6-3 Brian Teacher (usa) * - Paul McNamee (aus) 6-4 4-6 6-0 7-6 Guillermo Vilas (arg) * - John Sadri (usa) 7-5 6-4 2-6 4-6 6-3 Kim Warwick (aus) * - Bill Scanlon (usa) 6-4 6-2 4-6 6-1 Semifinals: Brian Teacher (usa) * - Peter McNamara (aus) 6-7 7-5 6-3 6-4 Kim Warwick (aus) * - Guillermo Vilas (arg) 6-7 6-4 6-2 2-6 6-4 Final: Brian Teacher (usa) * - Kim Warwick (aus) 7-5 7-6 6-2