26‑Nov‑1990 | Munich CH | Carpet | R32 | 99 | 207 | Paul Vojtischek [GER] d. (6)Jonsson | 6-4 6-1 | | | | | | | | | |
12‑Nov‑1990 | The Hague CH | Carpet | R16 | 102 | 93 | Marian Vajda [SVK] d. Jonsson | 5-7 6-1 6-0 | | | | | | | | | |
12‑Nov‑1990 | The Hague CH | Carpet | R32 | 102 | 170 | Jonsson d. (LL)Christian Saceanu [GER] | 6-4 7-5 | | | | | | | | | |
29‑Oct‑1990 | Bergen CH | Carpet | R32 | 97 | 992 | (WC)Thomas Enqvist [SWE] d. Jonsson | 7-5 4-6 6-4 | | | | | | | | | |
15‑Oct‑1990 | Vienna | Carpet | QF | 115 | 29 | (4)Horst Skoff [AUT] d. Jonsson | 6-3 6-4 | | | | | | | | | |
15‑Oct‑1990 | Vienna | Carpet | R16 | 115 | 39 | Jonsson d. (5)Carl Uwe Steeb [GER] | 6-3 6-3 | | | | | | | | | |
15‑Oct‑1990 | Vienna | Carpet | R32 | 115 | 121 | Jonsson d. Martin Sinner [GER] | 6-2 7-6 | | | | | | | | | |
8‑Oct‑1990 | Tel Aviv | Hard | QF | 122 | 12 | (1)Andrei Chesnokov [RUS] d. Jonsson | 6-3 6-1 | | | | | | | | | |
8‑Oct‑1990 | Tel Aviv | Hard | R16 | 122 | 115 | Jonsson d. (8)David Engel [SWE] | 0-6 6-4 6-2 | | | | | | | | | |
8‑Oct‑1990 | Tel Aviv | Hard | R32 | 122 | 154 | Jonsson d. Marcos Aurelio Gorriz [ESP] | 6-4 6-4 | | | | | | | | | |
10‑Sep‑1990 | Geneva | Clay | R16 | 108 | 22 | (1)Henri Leconte [FRA] d. Jonsson | 6-1 6-2 | | | | | | | | | |
10‑Sep‑1990 | Geneva | Clay | R32 | 108 | 122 | Jonsson d. David Engel [SWE] | 5-7 6-3 6-2 | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | R128 | 108 | 65 | Michael Stich [GER] d. Jonsson | 6-4 6-2 7-5 | | | | | | | | | |
20‑Aug‑1990 | San Marino | Clay | R32 | 106 | 135 | Cedric Pioline [FRA] d. Jonsson | 5-7 6-3 6-2 | | | | | | | | | |
23‑Jul‑1990 | Hanko CH | Clay | R16 | 99 | 235 | (Q)Andrei Olhovskiy [RUS] d. (5)Jonsson | 6-7 6-3 6-0 | | | | | | | | | |
23‑Jul‑1990 | Hanko CH | Clay | R32 | 99 | 995 | (5)Jonsson d. (WC)Janne Vilhunen [FIN] | 6-4 6-0 | | | | | | | | | |
16‑Jul‑1990 | Tampere CH | Clay | R16 | 101 | 122 | Nicklas Kulti [SWE] d. Jonsson | 2-6 6-1 7-6 | | | | | | | | | |
16‑Jul‑1990 | Tampere CH | Clay | R32 | 101 | 181 | Jonsson d. Dimitri Poliakov [UKR] | 3-6 6-1 6-3 | | | | | | | | | |
9‑Jul‑1990 | Bastad | Clay | SF | 115 | 34 | (4)Richard Fromberg [AUS] d. Jonsson | 6-4 6-2 | | | | | | | | | |
9‑Jul‑1990 | Bastad | Clay | QF | 115 | 80 | Jonsson d. Veli Paloheimo [FIN] | 6-1 6-2 | | | | | | | | | |
9‑Jul‑1990 | Bastad | Clay | R16 | 115 | 21 | Jonsson d. (1)Guillermo Perez Roldan [ARG] | 6-4 5-7 6-3 | | | | | | | | | |
9‑Jul‑1990 | Bastad | Clay | R32 | 115 | 65 | Jonsson d. Nicklas Kroon [SWE] | 7-5 3-6 6-3 | | | | | | | | | |
25‑Jun‑1990 | Wimbledon | Grass | R128 | 112 | 87 | Malivai Washington [USA] d. Jonsson | 6-2 6-3 6-1 | | | | | | | | | |
11‑Jun‑1990 | Rosmalen | Grass | R32 | 110 | 169 | (WC)Jan Siemerink [NED] d. Jonsson | 6-1 6-4 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R128 | 97 | 9 | (7)Thomas Muster [AUT] d. Jonsson | 7-5 6-3 6-2 | | | | | | | | | |
21‑May‑1990 | Bologna | Clay | R32 | 98 | 263 | (Q)Xavier Daufresne [BEL] d. Jonsson | 2-6 6-1 6-3 | | | | | | | | | |
14‑May‑1990 | Umag | Clay | R32 | 98 | 168 | Nuno Marques [POR] d. Jonsson | 4-6 7-5 6-3 | | | | | | | | | |
7‑May‑1990 | Hamburg Masters | Clay | R16 | 112 | 70 | Jimmy Arias [USA] d. (LL)Jonsson | 6-1 6-2 | | | | | | | | | |
7‑May‑1990 | Hamburg Masters | Clay | R32 | 112 | 91 | (LL)Jonsson d. (WC)Udo Riglewski [GER] | 6-0 6-4 | | | | | | | | | |
30‑Apr‑1990 | Madrid | Clay | R32 | 103 | 158 | (WC)Carlos Costa [ESP] d. Jonsson | 6-1 6-4 | | | | | | | | | |
23‑Apr‑1990 | Monte Carlo Masters | Clay | R64 | 103 | 29 | Jaime Yzaga [PER] d. (Q)Jonsson | 6-3 6-1 | | | | | | | | | |
26‑Mar‑1990 | Estoril CH | Clay | SF | 112 | 143 | Christian Miniussi [ARG] d. Jonsson | 4-6 6-1 7-6 | | | | | | | | | |
26‑Mar‑1990 | Estoril CH | Clay | QF | 112 | 84 | Jonsson d. Richard Fromberg [AUS] | 6-4 6-2 | | | | | | | | | |
26‑Mar‑1990 | Estoril CH | Clay | R16 | 112 | 142 | Jonsson d. Tarik Benhabiles [FRA] | 6-4 3-6 6-2 | | | | | | | | | |
26‑Mar‑1990 | Estoril CH | Clay | R32 | 112 | 64 | Jonsson d. (4)Martin Strelba [CZE] | 6-3 6-4 | | | | | | | | | |
12‑Mar‑1990 | Agadir CH | Clay | R16 | 114 | 23 | (1)Thomas Muster [AUT] d. Jonsson | 6-0 6-3 | | | | | | | | | |
12‑Mar‑1990 | Agadir CH | Clay | R32 | 114 | 91 | Jonsson d. Johan Anderson [AUS] | 6-0 6-3 | | | | | | | | | |
5‑Mar‑1990 | Casablanca | Clay | R32 | 113 | 138 | Roberto Azar [ARG] d. Jonsson | 6-3 7-5 | | | | | | | | | |
26‑Feb‑1990 | Cairo CH | Clay | R16 | 114 | 62 | (4)Tomas Carbonell [ESP] d. Jonsson | 6-4 6-1 | | | | | | | | | |
26‑Feb‑1990 | Cairo CH | Clay | R32 | 114 | | Jonsson d. (WC)Ahmed El Mehelmy [EGY] | 6-0 6-3 | | | | | | | | | |
5‑Feb‑1990 | Telford CH | Carpet | R32 | 106 | 171 | (Q)Fabrice Santoro [FRA] d. (3)Jonsson | 6-0 6-2 | | | | | | | | | |
15‑Jan‑1990 | Australian Open | Hard | R32 | 125 | 42 | Jonas Svensson [SWE] d. Jonsson | 6-4 7-5 3-6 4-6 6-2 | | | | | | | | | |
15‑Jan‑1990 | Australian Open | Hard | R64 | 125 | 32 | Jonsson d. Magnus Gustafsson [SWE] | 6-1 6-2 6-2 | | | | | | | | | |
15‑Jan‑1990 | Australian Open | Hard | R128 | 125 | 93 | Jonsson d. Tom Nijssen [NED] | 6-3 6-2 7-6 | | | | | | | | | |
1‑Jan‑1990 | Wellington | Hard | R16 | 131 | 17 | (1)Emilio Sanchez [ESP] d. Jonsson | 4-6 6-3 7-5 | | | | | | | | | |
1‑Jan‑1990 | Wellington | Hard | R32 | 131 | 497 | Jonsson d. (WC)Brett Steven [NZL] | 7-5 6-4 | | | | | | | | | |