Tennis Australian Open 1980 at Melbourne (aus) Men: Singles December 24-January 2: Quarterfinals: Victor Amaya (usa) * - Peter Rennert (usa) 7-6 6-4 6-4 Colin Dibley (aus) * - Mark Edmondson (aus) 3-6 6-4 3-6 7-6 6-4 John Sadri (usa) * - Rod Frawley (aus) 7-6 6-3 6-7 6-4 Guillermo Vilas (arg) * - Phil Dent (aus) 6-2 3-6 7-6 4-6 6-2 Semifinals: John Sadri (usa) * - Colin Dibley (aus) 6-4 7-6 6-7 6-4 Guillermo Vilas (arg) * - Victor Amaya (usa) 7-5 3-6 7-6 7-6 Final: Guillermo Vilas (arg) * - John Sadri (usa) 7-6 6-3 6-2