25‑Nov‑1991 | Bossonnens CH | Hard | R32 | 153 | 115 | Alex Antonitsch [AUT] d. Naewie | 6-4 6-4 | | | | | | | | | |
18‑Nov‑1991 | Munich CH | Carpet | F | 181 | 202 | (WC)Arne Thoms [GER] d. Naewie | 4-6 6-3 6-4 | | | | | | | | | |
18‑Nov‑1991 | Munich CH | Carpet | SF | 181 | 124 | Naewie d. Martin Strelba [CZE] | 6-3 7-6 | | | | | | | | | |
18‑Nov‑1991 | Munich CH | Carpet | QF | 181 | 141 | Naewie d. Chris Pridham [CAN] | 3-6 7-5 6-4 | | | | | | | | | |
18‑Nov‑1991 | Munich CH | Carpet | R16 | 181 | 255 | Naewie d. (Q)Sasa Hirszon [CRO] | 6-3 6-2 | | | | | | | | | |
18‑Nov‑1991 | Munich CH | Carpet | R32 | 181 | 76 | Naewie d. (1)Christian Saceanu [GER] | 6-7 6-3 6-4 | | | | | | | | | |
4‑Nov‑1991 | Helsinki CH | Carpet | R16 | 185 | 489 | (Q)Ulf Stenlund [SWE] d. Naewie | 6-7 6-3 6-4 | | | | | | | | | |
4‑Nov‑1991 | Helsinki CH | Carpet | R32 | 185 | 92 | Naewie d. (1)Veli Paloheimo [FIN] | 6-4 7-6 | | | | | | | | | |
28‑Oct‑1991 | Aachen CH | Carpet | R16 | 190 | 146 | Vladimir Gabrichidze [GEO] d. (WC)Naewie | 7-6 1-6 6-4 | | | | | | | | | |
28‑Oct‑1991 | Aachen CH | Carpet | R32 | 190 | 104 | (WC)Naewie d. Michiel Schapers [NED] | 6-4 6-2 | | | | | | | | | |
7‑Oct‑1991 | Reggio Calabri CH | Clay | R32 | 190 | 136 | (4)Massimo Cierro [ITA] d. Naewie | 6-4 6-3 | | | | | | | | | |
30‑Sep‑1991 | Siracusa CH | Clay | R16 | 192 | 153 | (8)Martin Wostenholme [CAN] d. Naewie | 4-6 6-3 6-2 | | | | | | | | | |
30‑Sep‑1991 | Siracusa CH | Clay | R32 | 192 | | Naewie d. (WC)Francesco Zugarelli [ITA] | 6-0 6-0 | | | | | | | | | |
16‑Sep‑1991 | Messina CH | Clay | R32 | 192 | 161 | Massimo Cierro [ITA] d. Naewie | 6-1 6-0 | | | | | | | | | |
2‑Sep‑1991 | Graz CH | Clay | R32 | 188 | | (WC)Thomas Prerovsky [AUT] d. (6)Naewie | 7-5 6-4 | | | | | | | | | |
15‑Jul‑1991 | Stuttgart Outdoor | Clay | R64 | 188 | 45 | Marc Rosset [SUI] d. (Q)Naewie | 6-2 6-4 | | 0.67 | 3.5% | 1.8% | 64.9% | 54.1% | 55.0% | 3/7 | 1:11 |
8‑Jul‑1991 | Neu Ulm CH | Clay | QF | 177 | 103 | (2)Rodolphe Gilbert [FRA] d. Naewie | 7-6 6-1 | | | | | | | | | |
8‑Jul‑1991 | Neu Ulm CH | Clay | R16 | 177 | 183 | Naewie d. Michael Tauson [DEN] | 6-4 6-2 | | | | | | | | | |
8‑Jul‑1991 | Neu Ulm CH | Clay | R32 | 177 | 220 | Naewie d. Jens Woehrmann [GER] | 7-6 6-2 | | | | | | | | | |
1‑Jul‑1991 | Nyon CH | Clay | F | 208 | 203 | (3)Naewie d. (1)Vladimir Gabrichidze [GEO] | 6-3 7-5 | | | | | | | | | |
1‑Jul‑1991 | Nyon CH | Clay | SF | 208 | 342 | (3)Naewie d. (Q)Michael Brown B395 [AUS] | 6-3 7-5 | | | | | | | | | |
1‑Jul‑1991 | Nyon CH | Clay | QF | 208 | 230 | (3)Naewie d. Claudio Mezzadri [SUI] | 6-2 6-2 | | | | | | | | | |
1‑Jul‑1991 | Nyon CH | Clay | R16 | 208 | 267 | (3)Naewie d. Sasa Hirszon [CRO] | 6-3 6-0 | | | | | | | | | |
1‑Jul‑1991 | Nyon CH | Clay | R32 | 208 | 584 | (3)Naewie d. (Q)Carsten Arriens [GER] | 6-4 7-6 | | | | | | | | | |
24‑Jun‑1991 | Sevilla CH | Clay | R16 | 208 | 269 | Dirk Dier [GER] d. (5)Naewie | 6-4 6-2 | | | | | | | | | |
24‑Jun‑1991 | Sevilla CH | Clay | R32 | 208 | 224 | (5)Naewie d. Jose Luis Aparisi [ESP] | 6-4 4-6 6-4 | | | | | | | | | |
17‑Jun‑1991 | Genova | Clay | R32 | 207 | 82 | (8)Jean Philippe Fleurian [FRA] d. (LL)Naewie | 6-1 7-5 | | 0.66 | 1.6% | 1.6% | 55.7% | 52.9% | 40.7% | 3/8 | 1:30 |
10‑Jun‑1991 | Cologne CH | Clay | R32 | 202 | 159 | Frederic Fontang [FRA] d. Naewie | 4-6 6-3 6-2 | | | | | | | | | |
3‑Jun‑1991 | Furth CH | Clay | SF | 229 | 119 | (2)Dimitri Poliakov [UKR] d. (WC)Naewie | 6-4 6-4 | | | | | | | | | |
3‑Jun‑1991 | Furth CH | Clay | QF | 229 | 187 | (WC)Naewie d. John Stimpson [USA] | 6-1 7-5 | | | | | | | | | |
3‑Jun‑1991 | Furth CH | Clay | R16 | 229 | 168 | (WC)Naewie d. Vaclav Roubicek [CZE] | 6-1 6-3 | | | | | | | | | |
3‑Jun‑1991 | Furth CH | Clay | R32 | 229 | 145 | (WC)Naewie d. (5)Andrew Sznajder [CAN] | 6-4 6-4 | | | | | | | | | |
27‑May‑1991 | Bielefeld CH | Clay | R32 | 229 | 199 | Jan Apell [SWE] d. (WC)Naewie | 6-2 4-6 7-6 | | | | | | | | | |
29‑Apr‑1991 | Prague CH | Clay | QF | 224 | 199 | Andres Vysand [GER] d. Naewie | 6-2 6-1 | | | | | | | | | |
29‑Apr‑1991 | Prague CH | Clay | R16 | 224 | 877 | Naewie d. (Q)Andrea Gaudenzi [ITA] | 6-3 6-1 | | | | | | | | | |
29‑Apr‑1991 | Prague CH | Clay | R32 | 224 | 193 | Naewie d. (6)David Rikl [CZE] | 6-1 6-3 | | | | | | | | | |
14‑Apr‑1991 | Germany 2 Masters 1 | Clay | R16 | 222 | 373 | David Prinosil [GER] d. (2)Naewie | 2-6 7-6 6-0 | | | | | | | | | |
14‑Apr‑1991 | Germany 2 Masters 1 | Clay | R32 | 222 | 366 | (2)Naewie d. Alessandro Dalboni [ITA] | 6-4 6-4 | | | | | | | | | |
1‑Apr‑1991 | Zaragoza CH | Clay | QF | 261 | 250 | (LL)Andres Vysand [GER] d. (Q)Naewie | 6-4 7-6 | | | | | | | | | |
1‑Apr‑1991 | Zaragoza CH | Clay | R16 | 261 | 131 | (Q)Naewie d. (8)Stefano Pescosolido [ITA] | 6-4 6-0 | | | | | | | | | |
1‑Apr‑1991 | Zaragoza CH | Clay | R32 | 261 | 187 | (Q)Naewie d. Maurice Ruah [VEN] | 6-3 6-2 | | | | | | | | | |
4‑Mar‑1991 | Spain 3 Masters 1 | Clay | R16 | 295 | 394 | David Prinosil [GER] d. (4)Naewie | 6-4 6-2 | | | | | | | | | |
4‑Mar‑1991 | Spain 3 Masters 1 | Clay | R32 | 295 | 507 | (4)Naewie d. (Q)Jordi Burillo [ESP] | 0-0 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 2 | Carpet | SF | | | (5)David Rikl [CZE] d. (8)Naewie | 6-3 7-5 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 3 | Carpet | SF | | | (2)Martin Damm [CZE] d. (5)Naewie | 6-1 6-4 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 1 | Carpet | QF | | | (2)Karsten Braasch [GER] d. (7)Naewie | 6-1 6-3 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 2 | Carpet | QF | | | (8)Naewie d. (WC)Robert Kroll [GER] | 7-6 7-5 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 3 | Carpet | QF | | | (5)Naewie d. (3)Arne Thoms [GER] | 4-6 6-4 7-6 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 1 | Carpet | R16 | | | (7)Naewie d. Markus Rackl [GER] | 6-4 6-4 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 2 | Carpet | R16 | | | (8)Naewie d. Jorgen Windahl [SWE] | 6-2 6-3 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 3 | Carpet | R16 | | | (5)Naewie d. (Q)David Prinosil [GER] | 6-3 3-6 6-3 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 4 | Carpet | R16 | | 1008 | Michael Schmidtmann [GER] d. (5)Naewie | 6-4 7-6 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 1 | Carpet | R32 | | | (7)Naewie d. (WC)Robert Kroll [GER] | 6-2 6-3 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 2 | Carpet | R32 | | 1008 | (8)Naewie d. (WC)Michael Schmidtmann [GER] | 6-4 6-3 | | | | | | | | | |
3‑Feb‑1991 | Germany 1 Masters 3 | Carpet | R32 | | | (5)Naewie d. Jorgen Windahl [SWE] | 6-3 6-1 | | | | | | | | | |
21‑Jan‑1991 | Heilbronn CH | Carpet | QF | 333 | 166 | Markus Zoecke [GER] d. (WC)Naewie | 6-3 6-4 | | | | | | | | | |
21‑Jan‑1991 | Heilbronn CH | Carpet | R16 | 333 | 137 | (WC)Naewie d. (7)Michael Tauson [DEN] | 6-4 6-0 | | | | | | | | | |
21‑Jan‑1991 | Heilbronn CH | Carpet | R32 | 333 | 167 | (WC)Naewie d. Johan Carlsson [SWE] | 7-5 6-4 | | | | | | | | | |