6‑Oct‑2003 | Barcelona CH | Clay | R32 | 216 | 82 | (3)Albert Portas [ESP] d. Marin | 6-4 6-3 | | | | | | | | | |
29‑Sep‑2003 | Seville CH | Clay | R32 | 199 | 226 | (Q)Andres Dellatorre [ARG] d. Marin | 6-0 6-0 | | | | | | | | | |
15‑Sep‑2003 | Banja Luka CH | Clay | QF | 196 | 352 | Mario Radic [CRO] d. (4)Marin | 6-1 6-3 | | | | | | | | | |
15‑Sep‑2003 | Banja Luka CH | Clay | R16 | 196 | 1262 | (4)Marin d. (WC)Ivan Dodig [CRO] | 6-1 6-3 | | | | | | | | | |
15‑Sep‑2003 | Banja Luka CH | Clay | R32 | 196 | 373 | (4)Marin d. Federico Luzzi [ITA] | 1-6 6-0 6-3 | | | | | | | | | |
8‑Sep‑2003 | Sofia CH | Clay | R32 | 196 | 197 | Francisco Fogues [ESP] d. (6)Marin | 6-7(7) 6-2 6-1 | | | | | | | | | |
18‑Aug‑2003 | Geneva CH | Clay | R32 | 180 | 220 | Juan Balcells [ESP] d. (5)Marin | 4-0 RET | | | | | | | | | |
21‑Jul‑2003 | Umag | Clay | R32 | 153 | 100 | Mariano Puerta [ARG] d. (Q)Marin | 6-3 7-5 | | 0.76 | 9.1% | 4.5% | 56.1% | 62.2% | 48.3% | 5/9 | 1:30 |
14‑Jul‑2003 | Helsinki CH | Clay | R16 | 146 | 120 | (3)Galo Blanco [ESP] d. Marin | 6-2 7-6(5) | | | | | | | | | |
14‑Jul‑2003 | Helsinki CH | Clay | R32 | 146 | 206 | Marin d. Oscar Serrano [ESP] | 6-2 2-6 6-2 | | | | | | | | | |
7‑Jul‑2003 | Scheveningen CH | Clay | R32 | 148 | 495 | (Q)Diego Veronelli [ARG] d. (6)Marin | 6-3 6-2 | | | | | | | | | |
30‑Jun‑2003 | Kosice2 CH | Clay | R32 | 144 | 119 | Alex Bogomolov Jr [RUS] d. Marin | 3-6 6-2 6-4 | | | | | | | | | |
26‑May‑2003 | Roland Garros | Clay | Q1 | 140 | 297 | Takao Suzuki [JPN] d. (25)Marin | 7-5 6-2 | | | | | | | | | |
21‑Apr‑2003 | Barcelona | Clay | R64 | 137 | 96 | (WC)Rafael Nadal [ESP] d. (WC)Marin | 6-0 RET | | 0.40 | 0.0% | 0.0% | 63.2% | 16.7% | 42.9% | 0/3 | 0:42 |
14‑Apr‑2003 | Bermuda CH | Clay | SF | 153 | 91 | (8)Nicolas Massu [CHI] d. Marin | 6-3 6-4 | | | | | | | | | |
14‑Apr‑2003 | Bermuda CH | Clay | QF | 153 | 104 | Marin d. Zeljko Krajan [CRO] | 2-0 RET | | | | | | | | | |
14‑Apr‑2003 | Bermuda CH | Clay | R16 | 153 | 139 | Marin d. Sergio Roitman [ARG] | 6-1 6-1 | | | | | | | | | |
14‑Apr‑2003 | Bermuda CH | Clay | R32 | 153 | 149 | Marin d. Alex Kim [USA] | 6-3 6-2 | | | | | | | | | |
24‑Mar‑2003 | Barletta CH | Clay | SF | 139 | 95 | (4)Albert Portas [ESP] d. Marin | 6-2 6-0 | | | | | | | | | |
24‑Mar‑2003 | Barletta CH | Clay | QF | 139 | 65 | Marin d. (1)Alberto Martin [ESP] | 6-3 6-2 | | | | | | | | | |
24‑Mar‑2003 | Barletta CH | Clay | R16 | 139 | 119 | Marin d. Dick Norman [BEL] | 6-2 6-0 | | | | | | | | | |
24‑Mar‑2003 | Barletta CH | Clay | R32 | 139 | 138 | Marin d. Noam Okun [ISR] | 6-2 6-1 | | | | | | | | | |
17‑Mar‑2003 | Cagliari CH | Clay | QF | 139 | 152 | Rafael Nadal [ESP] d. Marin | 6-2 7-6(3) | | | | | | | | | |
17‑Mar‑2003 | Cagliari CH | Clay | R16 | 139 | 106 | Marin d. (5)Attila Savolt [HUN] | 3-6 6-1 6-2 | | | | | | | | | |
17‑Mar‑2003 | Cagliari CH | Clay | R32 | 139 | 239 | Marin d. (Q)Oscar Serrano [ESP] | 1-6 6-3 6-3 | | | | | | | | | |
24‑Feb‑2003 | Acapulco | Clay | R16 | 154 | 32 | (7)Marcelo Rios [CHI] d. (LL)Marin | 6-3 6-1 | | 0.50 | 4.7% | 7.0% | 44.2% | 57.9% | 33.3% | 1/6 | 0:48 |
24‑Feb‑2003 | Acapulco | Clay | R32 | 154 | 77 | (LL)Marin d. Fernando Meligeni [BRA] | 6-1 6-4 | | 1.91 | 4.8% | 0.0% | 45.2% | 89.5% | 56.5% | 0/2 | 1:04 |