23‑Nov‑1987 | Itaparica | Hard | F | 64 | 41 | (8)Andre Agassi [USA] d. Mattar | 7-6 6-2 | | | | | | | | | |
23‑Nov‑1987 | Itaparica | Hard | SF | 64 | 36 | Mattar d. (7)Tomas Smid [CZE] | 4-6 7-6 6-4 | | | | | | | | | |
23‑Nov‑1987 | Itaparica | Hard | QF | 64 | 116 | Mattar d. Sergio Casal [ESP] | 7-5 5-7 7-6 | | | | | | | | | |
23‑Nov‑1987 | Itaparica | Hard | R16 | 64 | 105 | Mattar d. (WC)Cassio Motta [BRA] | 6-1 6-2 | | | | | | | | | |
23‑Nov‑1987 | Itaparica | Hard | R32 | 64 | 188 | Mattar d. (Q)Ivan Kley [BRA] | 6-4 6-7 6-3 | | | | | | | | | |
16‑Nov‑1987 | Buenos Aires | Clay | R32 | 64 | 168 | Franco Davin [ARG] d. Mattar | 6-2 7-6 | | | | | | | | | |
9‑Nov‑1987 | Sao Paulo | Hard | F | 76 | 94 | Jaime Yzaga [PER] d. (4)Mattar | 6-2 4-6 6-2 | | | | | | | | | |
9‑Nov‑1987 | Sao Paulo | Hard | SF | 76 | 162 | (4)Mattar d. Dan Cassidy [USA] | 6-2 6-4 | | | | | | | | | |
9‑Nov‑1987 | Sao Paulo | Hard | QF | 76 | 154 | (4)Mattar d. Marcelo Filippini [URU] | 6-3 6-4 | | | | | | | | | |
9‑Nov‑1987 | Sao Paulo | Hard | R16 | 76 | 105 | (4)Mattar d. Javier Sanchez [ESP] | 7-5 6-0 | | | | | | | | | |
9‑Nov‑1987 | Sao Paulo | Hard | R32 | 76 | 100 | (4)Mattar d. John Ross [USA] | 0-6 7-6 6-2 | | | | | | | | | |
19‑Oct‑1987 | Vienna | Hard | R32 | 62 | 137 | (Q)Mark Dickson [USA] d. Mattar | 6-3 6-7 6-1 | | | | | | | | | |
12‑Oct‑1987 | Toulouse | Hard | QF | 71 | 79 | Ricki Osterthun [GER] d. Mattar | 3-6 6-4 6-3 | | | | | | | | | |
12‑Oct‑1987 | Toulouse | Hard | R16 | 71 | 758 | Mattar d. (Q)Piet Norval [RSA] | 7-6 6-4 | | | | | | | | | |
12‑Oct‑1987 | Toulouse | Hard | R32 | 71 | 16 | Mattar d. (2)Emilio Sanchez [ESP] | 6-4 6-4 | | | | | | | | | |
2‑Oct‑1987 | Davis Cup AME F: BRA vs ECU | Clay | RR | | | Mattar d. Hugo Nunez [ECU] | 6-1 6-1 6-2 | | | | | | | | | |
2‑Oct‑1987 | Davis Cup AME F: BRA vs ECU | Clay | RR | | | Mattar d. Andres Gomez [ECU] | 6-3 1-6 8-10 6-2 6-1 | | | | | | | | | |
21‑Sep‑1987 | Barcelona | Clay | R16 | 78 | 15 | (4)Emilio Sanchez [ESP] d. Mattar | 6-1 7-6 | | | | | | | | | |
21‑Sep‑1987 | Barcelona | Clay | R32 | 78 | 69 | Mattar d. Horacio De La Pena [ARG] | 6-3 6-4 | | | | | | | | | |
21‑Sep‑1987 | Barcelona | Clay | R64 | 78 | 43 | Mattar d. (13)Tarik Benhabiles [FRA] | 7-5 6-0 | | | | | | | | | |
14‑Sep‑1987 | Geneva | Clay | R16 | 74 | 42 | (6)Ulf Stenlund [SWE] d. Mattar | 6-3 6-0 | | | | | | | | | |
14‑Sep‑1987 | Geneva | Clay | R32 | 74 | 493 | Mattar d. (Q)Peter Bastiansen [DEN] | 6-2 1-6 6-3 | | | | | | | | | |
24‑Jul‑1987 | Davis Cup AME SF: CHI vs BRA | Clay | RR | | | Mattar d. Ricardo Acuna [CHI] | 6-2 6-2 10-8 | | | | | | | | | |
24‑Jul‑1987 | Davis Cup AME SF: CHI vs BRA | Clay | RR | | | Pedro Rebolledo [CHI] d. Mattar | 4-6 6-1 6-3 | | | | | | | | | |
13‑Jul‑1987 | Bordeaux | Clay | R16 | 92 | 453 | (Q)Gabriel Urpi [ESP] d. (6)Mattar | 6-4 6-2 | | | | | | | | | |
13‑Jul‑1987 | Bordeaux | Clay | R32 | 92 | 184 | (6)Mattar d. Ivo Werner [GER] | 6-2 6-3 | | | | | | | | | |
6‑Jul‑1987 | Gstaad | Clay | R16 | 94 | 21 | (5)Mikael Pernfors [SWE] d. Mattar | 6-3 2-6 6-4 | | | | | | | | | |
6‑Jul‑1987 | Gstaad | Clay | R32 | 94 | 42 | Mattar d. Milan Srejber [CZE] | 6-4 5-7 6-4 | | | | | | | | | |
22‑Jun‑1987 | Wimbledon | Grass | R128 | 84 | 85 | Danie Visser [RSA] d. Mattar | 3-6 7-6 6-4 6-4 | | | | | | | | | |
25‑May‑1987 | Roland Garros | Clay | R64 | 76 | 34 | Jay Berger [USA] d. Mattar | 7-6 6-3 6-3 | | | | | | | | | |
25‑May‑1987 | Roland Garros | Clay | R128 | 76 | 131 | Mattar d. Paul Vojtischek [GER] | 3-6 0-6 6-4 7-5 6-4 | | | | | | | | | |
11‑May‑1987 | Rome | Clay | R32 | 76 | 4 | (2)Mats Wilander [SWE] d. Mattar | 6-2 6-1 | | | | | | | | | |
11‑May‑1987 | Rome | Clay | R64 | 76 | 372 | Mattar d. (Q)Alberto Mancini [ARG] | 6-4 6-4 | | | | | | | | | |
4‑May‑1987 | Munich | Clay | R16 | 83 | 26 | (3)Joakim Nystrom [SWE] d. Mattar | 6-4 4-6 6-3 | | | | | | | | | |
4‑May‑1987 | Munich | Clay | R32 | 83 | 69 | Mattar d. Francisco Yunis [ARG] | 3-6 7-6 7-5 | | | | | | | | | |
27‑Apr‑1987 | Hamburg | Clay | R64 | 66 | 97 | (WC)Carl Uwe Steeb [GER] d. Mattar | 7-5 6-4 | | | | | | | | | |
20‑Apr‑1987 | Monte Carlo | Clay | R64 | 63 | 57 | Tomas Smid [CZE] d. Mattar | 6-2 6-2 | | | | | | | | | |
13‑Mar‑1987 | Davis Cup AME QF: URU vs BRA | Clay | RR | | | Mattar d. Diego Perez [URU] | 3-6 6-2 4-6 6-3 7-5 | | | | | | | | | |
13‑Mar‑1987 | Davis Cup AME QF: URU vs BRA | Clay | RR | | | Mattar d. Victor Caldarelli [URU] | 6-3 6-2 3-6 4-6 7-5 | | | | | | | | | |
23‑Feb‑1987 | Key Biscayne | Hard | R64 | 76 | 36 | (30)Ulf Stenlund [SWE] d. Mattar | 1-6 6-3 6-2 6-3 | | | | | | | | | |
23‑Feb‑1987 | Key Biscayne | Hard | R128 | 76 | 77 | Mattar d. Eduardo Bengoechea [ARG] | 6-4 2-6 6-7 7-6 6-3 | | | | | | | | | |
2‑Feb‑1987 | Philadelphia | Carpet | R64 | 74 | | (Q)Martin Blackman [USA] d. Mattar | 7-6 6-2 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | F | 96 | 48 | (5)Mattar d. (1)Cassio Motta [BRA] | 6-3 5-7 6-2 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | SF | 96 | 163 | (5)Mattar d. Bruno Oresar [CRO] | 4-6 7-6 6-4 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | QF | 96 | 193 | (5)Mattar d. Ivo Werner [GER] | 6-3 2-6 7-6 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | R16 | 96 | 207 | (5)Mattar d. Derek Tarr [USA] | 6-1 6-3 | | | | | | | | | |
26‑Jan‑1987 | Guaruja | Hard | R32 | 96 | 161 | (5)Mattar d. Blaine Willenborg [USA] | 6-2 6-1 | | | | | | | | | |