21‑Sep‑1987 | Barcelona | Clay | R64 | 249 | 141 | (Q)Jordi Arrese [ESP] d. (WC)Avendano | 6-2 6-3 | | | | | | | | | |
27‑Jul‑1987 | Bastad | Clay | R32 | 204 | 21 | (7)Mikael Pernfors [SWE] d. Avendano | 5-7 6-3 6-3 | | | | | | | | | |
13‑Jul‑1987 | Indianapolis | Clay | R64 | 197 | 171 | Tony Mmoh [NGR] d. Avendano | 6-3 6-0 | | | | | | | | | |
6‑Jul‑1987 | Boston | Clay | R64 | 195 | 189 | (Q)Roberto Saad [ARG] d. Avendano | 7-6 7-5 | | | | | | | | | |
22‑Jun‑1987 | Wimbledon | Grass | R128 | 186 | 41 | Johan Kriek [USA] d. Avendano | 6-2 6-1 4-6 6-4 | | | | | | | | | |
15‑Jun‑1987 | Athens | Clay | R32 | 136 | 164 | (LL)Thierry Champion [FRA] d. Avendano | 6-4 6-1 | | | | | | | | | |
8‑Jun‑1987 | Bologna | Clay | R32 | 132 | 103 | Franco Davin [ARG] d. Avendano | 6-3 7-5 | | | | | | | | | |
4‑May‑1987 | Forest Hills | Clay | R32 | 132 | 2 | (1)Boris Becker [GER] d. Avendano | 7-6 5-7 6-2 | | | | | | | | | |
4‑May‑1987 | Forest Hills | Clay | R64 | 132 | 55 | Avendano d. Bill Scanlon [USA] | 6-1 6-2 | | | | | | | | | |
6‑Apr‑1987 | Bari | Clay | QF | 145 | 31 | (3)Horacio De La Pena [ARG] d. Avendano | 6-3 1-6 7-6 | | | | | | | | | |
6‑Apr‑1987 | Bari | Clay | R16 | 145 | 45 | Avendano d. (5)Jay Berger [USA] | 5-7 7-5 6-3 | | | | | | | | | |
6‑Apr‑1987 | Bari | Clay | R32 | 145 | 147 | Avendano d. Tore Meinecke [GER] | 7-5 6-4 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | R16 | 135 | 219 | (Q)Julio Goes [BRA] d. (8)Avendano | 7-5 6-4 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | R32 | 135 | 206 | (8)Avendano d. Joao Soares [BRA] | 6-2 6-0 | | | | | | | | | |