18‑Nov‑1985 | Vienna | Hard | R32 | 56 | 50 | (8)Ronald Agenor [USA] d. Vajda | 6-4 6-2 | | | | | | | | | |
21‑Oct‑1985 | Cologne | Hard | R32 | 55 | 125 | (Q)Goran Prpic [CRO] d. (8)Vajda | 6-3 6-3 | | | | | | | | | |
14‑Oct‑1985 | Basel | Hard | R32 | 48 | 55 | Horacio De La Pena [ARG] d. Vajda | 6-2 6-1 | | | | | | | | | |
7‑Oct‑1985 | Toulouse | Hard | R16 | 45 | 177 | Jerome Potier [FRA] d. (7)Vajda | 6-3 6-2 | | | | | | | | | |
7‑Oct‑1985 | Toulouse | Hard | R32 | 45 | 123 | (7)Vajda d. Stefan Simonsson [SWE] | 4-6 6-3 6-3 | | | | | | | | | |
23‑Sep‑1985 | Barcelona | Clay | R32 | 44 | 3 | (1)Mats Wilander [SWE] d. (LL)Vajda | 7-5 6-4 | | | | | | | | | |
23‑Sep‑1985 | Barcelona | Clay | R64 | 44 | 84 | (LL)Vajda d. Claudio Panatta [ITA] | 6-3 6-2 | | | | | | | | | |
16‑Sep‑1985 | Geneva | Clay | QF | 56 | 23 | (6)Henri Leconte [FRA] d. Vajda | 7-5 6-1 | | | | | | | | | |
16‑Sep‑1985 | Geneva | Clay | R16 | 56 | 68 | Vajda d. Kent Carlsson [SWE] | 1-6 6-2 7-5 | | | | | | | | | |
16‑Sep‑1985 | Geneva | Clay | R32 | 56 | 20 | Vajda d. (4)Martin Jaite [ARG] | 6-7 6-4 7-5 | | | | | | | | | |
27‑Aug‑1985 | US Open | Hard | R64 | 65 | 181 | Dan Goldie [USA] d. Vajda | 1-6 6-3 6-2 6-2 | | | | | | | | | |
27‑Aug‑1985 | US Open | Hard | R128 | 65 | 98 | Vajda d. Mike De Palmer [USA] | 2-6 2-6 6-3 7-6 7-5 | | | | | | | | | |
12‑Aug‑1985 | Cleveland | Hard | R16 | 64 | 88 | Mike Bauer [USA] d. Vajda | 6-2 6-3 | | | | | | | | | |
12‑Aug‑1985 | Cleveland | Hard | R32 | 64 | 57 | Vajda d. (7)Marty Davis [USA] | 6-4 6-7 7-6 | | | | | | | | | |
5‑Aug‑1985 | Kitzbuhel | Clay | SF | 108 | 72 | (11)Michael Westphal [GER] d. Vajda | 7-6 6-3 | | | | | | | | | |
5‑Aug‑1985 | Kitzbuhel | Clay | QF | 108 | 27 | Vajda d. (4)Henri Leconte [FRA] | 6-2 6-4 | | | | | | | | | |
5‑Aug‑1985 | Kitzbuhel | Clay | R16 | 108 | 57 | Vajda d. (10)Shahar Perkiss [ISR] | 3-6 6-0 6-3 | | | | | | | | | |
5‑Aug‑1985 | Kitzbuhel | Clay | R32 | 108 | 48 | Vajda d. (8)Lawson Duncan [USA] | 7-5 6-4 | | | | | | | | | |
5‑Aug‑1985 | Kitzbuhel | Clay | R64 | 108 | 170 | Vajda d. Ivan Kley [BRA] | 6-4 6-3 | | | | | | | | | |
8‑Jul‑1985 | Gstaad | Clay | R16 | 109 | 64 | Andreas Maurer [GER] d. Vajda | 6-3 6-3 | | | | | | | | | |
8‑Jul‑1985 | Gstaad | Clay | R32 | 109 | 145 | Vajda d. (Q)Kent Carlsson [SWE] | 6-4 6-3 | | | | | | | | | |
24‑Jun‑1985 | Wimbledon | Grass | R128 | 94 | 92 | Mike Bauer [USA] d. Vajda | 5-7 7-6 7-5 6-2 | | | | | | | | | |
27‑May‑1985 | Roland Garros | Clay | R64 | 103 | 46 | Balazs Taroczy [HUN] d. Vajda | 4-6 6-3 6-7 6-4 6-4 | | | | | | | | | |
27‑May‑1985 | Roland Garros | Clay | R128 | 103 | 72 | Vajda d. Vincent Van Patten [USA] | 6-4 3-6 4-6 6-3 6-3 | | | | | | | | | |
6‑May‑1985 | Forest Hills | Clay | R32 | 122 | 20 | (Q)Yannick Noah [FRA] d. Vajda | 6-2 6-1 | | | | | | | | | |
6‑May‑1985 | Forest Hills | Clay | R64 | 122 | 19 | Vajda d. (6)Vitas Gerulaitis [USA] | 4-6 6-4 6-4 | | | | | | | | | |
1‑Apr‑1985 | Marrakech CH | Clay | QF | 131 | 184 | Jose Lopez Maeso [ESP] d. Vajda | 7-5 6-4 | | | | | | | | | |
1‑Apr‑1985 | Marrakech CH | Clay | R16 | 131 | 109 | Vajda d. (1)Peter Elter [GER] | 6-4 3-6 7-5 | | | | | | | | | |
1‑Apr‑1985 | Marrakech CH | Clay | R32 | 131 | 232 | Vajda d. Jerome Potier [FRA] | 6-2 6-1 | | | | | | | | | |
25‑Mar‑1985 | Tunis CH | Clay | SF | 173 | 84 | Hans Schwaier [GER] d. (Q)Vajda | 6-4 6-4 | | | | | | | | | |
25‑Mar‑1985 | Tunis CH | Clay | QF | 173 | 280 | (Q)Vajda d. (WC)Oliver Freund [GER] | 7-6 6-1 | | | | | | | | | |
25‑Mar‑1985 | Tunis CH | Clay | R16 | 173 | 38 | (Q)Vajda d. (4)Victor Pecci [PAR] | 6-1 6-2 | | | | | | | | | |
25‑Mar‑1985 | Tunis CH | Clay | R32 | 173 | 78 | (Q)Vajda d. Horacio De La Pena [ARG] | 7-6 6-2 | | | | | | | | | |
4‑Mar‑1985 | Vienna CH | Carpet | R32 | 175 | 194 | Jonas Svensson [SWE] d. (4)Vajda | 6-0 6-1 | | | | | | | | | |
4‑Feb‑1985 | Delray Beach | Hard | R32 | 196 | 75 | Tarik Benhabiles [FRA] d. Vajda | 5-7 6-3 6-2 | | | | | | | | | |
4‑Feb‑1985 | Delray Beach | Hard | R64 | 196 | 125 | Vajda d. Andreas Maurer [GER] | W/O | | | | | | | | | |
4‑Feb‑1985 | Delray Beach | Hard | R128 | 196 | 98 | Vajda d. Todd Nelson [USA] | 3-6 6-2 6-3 | | | | | | | | | |