| 27‑Oct‑2003 | Paris Masters | Carpet | R32 | 11 | 31 | Tim Henman [GBR] d. (7)Grosjean | 3-6 6-4 7-5 | | 0.87 | 5.0% | 3.0% | 39.6% | 65.0% | 50.8% | 3/8 | 2:22 |
| 20‑Oct‑2003 | St. Petersburg | Hard | QF | 10 | 152 | (WC)Alex Corretja [ESP] d. (2)Grosjean | 4-6 6-2 7-6(5) | (ch) | 0.97 | 6.5% | 5.4% | 48.4% | 66.7% | 62.5% | 6/10 | 2:25 |
| 20‑Oct‑2003 | St. Petersburg | Hard | R16 | 10 | 68 | (2)Grosjean d. Antony Dupuis [FRA] | 6-2 6-2 | | 3.10 | 0.0% | 0.0% | 50.0% | 100.0% | 68.4% | 0/0 | 1:02 |
| 20‑Oct‑2003 | St. Petersburg | Hard | R32 | 10 | 56 | (2)Grosjean d. Stefan Koubek [AUT] | 6-7(4) 6-3 7-5 | | 1.13 | 7.1% | 8.2% | 50.0% | 73.5% | 51.0% | 3/6 | 2:20 |
| 13‑Oct‑2003 | Madrid Masters | Hard | QF | 10 | 18 | (15)Younes El Aynaoui [MAR] d. (6)Grosjean | 3-6 7-6(6) 6-2 | | | | | | | | | |
| 13‑Oct‑2003 | Madrid Masters | Hard | R16 | 10 | 33 | (6)Grosjean d. Vincent Spadea [USA] | 6-3 6-2 | | | | | | | | | |
| 13‑Oct‑2003 | Madrid Masters | Hard | R32 | 10 | 72 | (6)Grosjean d. (Q)David Ferrer [ESP] | 6-4 6-2 | | | | | | | | | |
| 6‑Oct‑2003 | Lyon | Carpet | R32 | 10 | 112 | (WC)Nicolas Mahut [FRA] d. (2)Grosjean | 4-6 6-3 RET | | 0.85 | 10.7% | 3.6% | 50.0% | 85.7% | 42.9% | 1/3 | 1:14 |
| 29‑Sep‑2003 | Tokyo | Hard | F | 10 | 8 | (1)Rainer Schuettler [GER] d. (2)Grosjean | 7-6(5) 6-2 | | 0.73 | 10.0% | 0.0% | 61.4% | 67.4% | 44.4% | 2/5 | 1:28 |
| 29‑Sep‑2003 | Tokyo | Hard | SF | 10 | 11 | (2)Grosjean d. (3)Paradorn Srichaphan [THA] | 4-6 6-3 6-4 | | 0.99 | 6.9% | 3.9% | 49.0% | 80.0% | 57.7% | 6/7 | 2:02 |
| 29‑Sep‑2003 | Tokyo | Hard | QF | 10 | 62 | (2)Grosjean d. (8)Jan Michael Gambill [USA] | 6-3 7-6(4) | | 1.64 | 21.9% | 0.0% | 59.4% | 84.2% | 65.4% | 0/1 | 1:36 |
| 29‑Sep‑2003 | Tokyo | Hard | R16 | 10 | 141 | (2)Grosjean d. Dennis Van Scheppingen [NED] | 6-3 7-6(3) | | 1.33 | 17.4% | 2.9% | 50.7% | 88.6% | 47.1% | 5/7 | 1:29 |
| 29‑Sep‑2003 | Tokyo | Hard | R32 | 10 | 76 | (2)Grosjean d. Ivo Karlovic [CRO] | 6-3 7-6(8) | | 1.42 | 7.2% | 1.4% | 49.3% | 82.4% | 74.3% | 2/2 | 1:31 |
| 25‑Aug‑2003 | US Open | Hard | R128 | 9 | 158 | (Q)Ramon Delgado [PAR] d. (9)Grosjean | 6-4 6-7(3) 4-6 7-6(7) 6-4 | | 1.13 | 10.6% | 3.5% | 45.3% | 79.2% | 57.0% | 8/13 | 4:12 |
| 11‑Aug‑2003 | Cincinnati Masters | Hard | R64 | 9 | 105 | (Q)Wesley Moodie [RSA] d. (10)Grosjean | 6-3 6-7(9) 6-3 | | 0.68 | 5.5% | 3.6% | 62.7% | 69.6% | 56.1% | 4/6 | 2:11 |
| 4‑Aug‑2003 | Canada Masters | Hard | R16 | 10 | 7 | (6)Andy Roddick [USA] d. (9)Grosjean | 6-3 6-3 | | 0.76 | 5.0% | 3.3% | 41.7% | 64.0% | 51.4% | 2/5 | 1:15 |
| 4‑Aug‑2003 | Canada Masters | Hard | R32 | 10 | 168 | (9)Grosjean d. (Q)Ramon Delgado [PAR] | 6-3 6-2 | | 1.37 | 13.6% | 0.0% | 52.5% | 71.0% | 60.7% | 6/7 | 1:05 |
| 4‑Aug‑2003 | Canada Masters | Hard | R64 | 10 | 57 | (9)Grosjean d. Fernando Vicente [ESP] | 6-3 6-3 | | 1.92 | 16.7% | 6.3% | 54.2% | 88.5% | 63.6% | 2/2 | 1:08 |
| 28‑Jul‑2003 | Los Angeles | Hard | QF | 9 | 25 | (7)Wayne Ferreira [RSA] d. (2)Grosjean | 7-6(4) 6-7(4) 6-2 | | 0.67 | 8.8% | 0.0% | 50.0% | 77.2% | 50.9% | 3/5 | 2:03 |
| 28‑Jul‑2003 | Los Angeles | Hard | R16 | 9 | 46 | (2)Grosjean d. Robby Ginepri [USA] | 6-2 6-3 | | 1.55 | 12.5% | 0.0% | 51.8% | 89.7% | 48.1% | 3/3 | 1:09 |
| 28‑Jul‑2003 | Los Angeles | Hard | R32 | 9 | 64 | (2)Grosjean d. Xavier Malisse [BEL] | 4-6 7-5 6-3 | | 0.93 | 4.3% | 2.1% | 53.2% | 80.0% | 54.5% | 6/7 | 1:55 |
| 14‑Jul‑2003 | Stuttgart | Clay | R32 | 10 | 60 | Filippo Volandri [ITA] d. (4)Grosjean | 6-2 6-1 | | 0.42 | 4.4% | 2.2% | 44.4% | 55.0% | 36.0% | 4/9 | 0:53 |
| 23‑Jun‑2003 | Wimbledon | Grass | SF | 14 | 48 | Mark Philippoussis [AUS] d. (13)Grosjean | 7-6(3) 6-3 6-3 | (ch) | 0.66 | 5.6% | 3.4% | 52.8% | 74.5% | 57.1% | 5/8 | 1:56 |
| 23‑Jun‑2003 | Wimbledon | Grass | QF | 14 | 29 | (13)Grosjean d. (10)Tim Henman [GBR] | 7-6(8) 3-6 6-3 6-4 | | 1.23 | 9.7% | 0.8% | 55.6% | 75.4% | 52.7% | 6/11 | 3:14 |
| 23‑Jun‑2003 | Wimbledon | Grass | R16 | 14 | 3 | (13)Grosjean d. (3)Juan Carlos Ferrero [ESP] | 6-2 4-6 7-6(2) 7-6(3) | | 1.14 | 13.4% | 2.8% | 56.3% | 81.3% | 48.4% | 4/7 | 3:15 |
| 23‑Jun‑2003 | Wimbledon | Grass | R32 | 14 | 150 | (13)Grosjean d. (Q)Wesley Moodie [RSA] | 6-7(5) 6-2 6-4 6-4 | | 1.57 | 13.0% | 2.6% | 56.5% | 84.6% | 62.0% | 3/3 | 2:44 |
| 23‑Jun‑2003 | Wimbledon | Grass | R64 | 14 | 77 | (13)Grosjean d. Wayne Arthurs [AUS] | 6-3 6-4 6-7(12) 6-3 | | 1.15 | 10.9% | 0.0% | 57.1% | 79.4% | 74.5% | 0/0 | 2:20 |
| 23‑Jun‑2003 | Wimbledon | Grass | R128 | 14 | 106 | (13)Grosjean d. Thomas Enqvist [SWE] | 4-6 6-3 6-4 7-6(4) | | 1.25 | 21.6% | 0.8% | 58.4% | 84.9% | 63.5% | 8/9 | 2:36 |
| 16‑Jun‑2003 | s Hertogenbosch | Grass | R16 | 14 | 103 | Jan Vacek [CZE] d. (5)Grosjean | 6-4 3-6 6-2 | | 0.86 | 4.3% | 5.4% | 47.8% | 59.1% | 54.2% | 4/8 | 1:44 |
| 16‑Jun‑2003 | s Hertogenbosch | Grass | R32 | 14 | 344 | (5)Grosjean d. (Q)Philipp Petzschner [GER] | 6-2 5-7 6-3 | | 1.02 | 4.9% | 2.9% | 44.1% | 66.7% | 63.2% | 5/7 | 1:58 |
| 9‑Jun‑2003 | Queen's Club | Grass | F | 20 | 7 | (3)Andy Roddick [USA] d. (6)Grosjean | 6-3 6-3 | | 0.66 | 7.8% | 2.0% | 43.1% | 59.1% | 51.7% | 3/6 | 1:00 |
| 9‑Jun‑2003 | Queen's Club | Grass | SF | 20 | 26 | (6)Grosjean d. (7)Tim Henman [GBR] | 6-3 6-4 | | 1.20 | 6.7% | 1.3% | 52.0% | 76.9% | 50.0% | 5/6 | 1:33 |
| 9‑Jun‑2003 | Queen's Club | Grass | QF | 20 | 1 | (6)Grosjean d. (1)Lleyton Hewitt [AUS] | 6-3 6-4 | | 1.18 | 8.2% | 1.6% | 49.2% | 60.0% | 64.5% | 1/3 | 1:29 |
| 9‑Jun‑2003 | Queen's Club | Grass | R16 | 20 | 279 | (6)Grosjean d. (Q)Todd Reid [AUS] | 6-1 6-4 | | 1.44 | 9.3% | 5.6% | 57.4% | 83.9% | 39.1% | 5/6 | 1:07 |
| 9‑Jun‑2003 | Queen's Club | Grass | R32 | 20 | 87 | (6)Grosjean d. Michel Kratochvil [SUI] | 6-3 6-4 | | 1.60 | 14.5% | 1.8% | 65.5% | 72.2% | 73.7% | 1/2 | 1:06 |
| 26‑May‑2003 | Roland Garros | Clay | R64 | 15 | 63 | Fernando Vicente [ESP] d. (14)Grosjean | 7-6(3) 6-3 6-3 | | 0.69 | 3.3% | 0.0% | 53.8% | 71.4% | 47.6% | 0/4 | 2:12 |
| 26‑May‑2003 | Roland Garros | Clay | R128 | 15 | 99 | (14)Grosjean d. Adrian Voinea [ROU] | 6-4 7-6(3) 3-6 6-3 | | 1.07 | 0.7% | 0.7% | 47.5% | 68.2% | 47.9% | 8/15 | 3:17 |
| 12‑May‑2003 | Hamburg Masters | Clay | R32 | 15 | 27 | Tim Henman [GBR] d. (10)Grosjean | 6-0 3-6 6-2 | | 0.74 | 6.1% | 0.0% | 51.2% | 54.8% | 55.0% | 2/7 | 1:55 |
| 12‑May‑2003 | Hamburg Masters | Clay | R64 | 15 | 79 | (10)Grosjean d. (Q)Filippo Volandri [ITA] | 6-3 6-4 | | 1.16 | 0.0% | 0.0% | 51.9% | 68.3% | 55.3% | 7/8 | 1:29 |
| 5‑May‑2003 | Rome Masters | Clay | R64 | 14 | 19 | Tommy Robredo [ESP] d. (13)Grosjean | 6-7(4) 6-4 6-3 | | 0.84 | 1.7% | 0.9% | 55.6% | 69.2% | 40.4% | 4/9 | 2:39 |
| 4‑Apr‑2003 | Davis Cup WG QF: FRA vs SUI | Hard | RR | 11 | 174 | Grosjean d. George Bastl [SUI] | 6-3 6-4 3-6 6-3 | | | | | | | | | |
| 17‑Mar‑2003 | Miami Masters | Hard | R64 | 11 | 53 | Mardy Fish [USA] d. (11)Grosjean | 6-4 7-6(3) | | 0.71 | 7.3% | 1.2% | 65.9% | 66.7% | 50.0% | 2/4 | 1:40 |
| 10‑Mar‑2003 | Indian Wells Masters | Hard | R16 | 11 | 6 | (6)Andy Roddick [USA] d. (11)Grosjean | 7-6(5) 2-6 7-6(1) | | 1.11 | 7.7% | 1.0% | 58.7% | 78.7% | 58.1% | 2/2 | 2:21 |
| 10‑Mar‑2003 | Indian Wells Masters | Hard | R32 | 11 | 31 | (11)Grosjean d. Xavier Malisse [BEL] | 6-3 6-3 | | 1.41 | 7.0% | 3.5% | 49.1% | 89.3% | 55.2% | 3/3 | 1:18 |
| 10‑Mar‑2003 | Indian Wells Masters | Hard | R64 | 11 | 45 | (11)Grosjean d. David Sanchez [ESP] | 6-3 6-2 | | 1.63 | 12.5% | 0.0% | 47.9% | 78.3% | 64.0% | 2/3 | 1:03 |
| 17‑Feb‑2003 | Rotterdam | Hard | SF | 12 | 72 | (WC)Raemon Sluiter [NED] d. (6)Grosjean | 6-3 6-3 | | 0.65 | 4.2% | 0.0% | 54.2% | 46.2% | 45.5% | 5/10 | 1:03 |
| 17‑Feb‑2003 | Rotterdam | Hard | QF | 12 | 41 | (6)Grosjean d. Nicolas Escude [FRA] | 5-7 7-6(3) 4-4 RET | | 0.94 | 7.8% | 0.0% | 64.1% | 65.2% | 48.6% | 3/7 | 2:19 |
| 17‑Feb‑2003 | Rotterdam | Hard | R16 | 12 | 53 | (6)Grosjean d. Dominik Hrbaty [SVK] | 7-5 6-3 | | 1.53 | 9.3% | 1.9% | 48.1% | 84.6% | 64.3% | 3/4 | 1:17 |
| 17‑Feb‑2003 | Rotterdam | Hard | R32 | 12 | 163 | (6)Grosjean d. (Q)Renzo Furlan [ITA] | 6-3 6-4 | | 1.43 | 3.5% | 0.0% | 47.4% | 74.1% | 66.7% | 1/2 | 1:18 |
| 10‑Feb‑2003 | Marseille | Hard | R16 | 12 | 62 | Karol Kucera [SVK] d. (3)Grosjean | 7-6(4) 6-1 | | 0.80 | 1.5% | 1.5% | 56.9% | 54.1% | 42.9% | 6/11 | 1:26 |
| 10‑Feb‑2003 | Marseille | Hard | R32 | 12 | 162 | (3)Grosjean d. (Q)Alex Calatrava [ESP] | 6-2 6-1 | | 3.25 | 30.8% | 2.6% | 69.2% | 92.6% | 66.7% | 0/0 | 0:47 |
| 7‑Feb‑2003 | Davis Cup WG R1: ROU vs FRA | Carpet | RR | 12 | 78 | Grosjean d. Adrian Voinea [ROU] | 6-2 6-3 7-6(10) | | | | | | | | | |
| 13‑Jan‑2003 | Australian Open | Hard | QF | 16 | 2 | (2)Andre Agassi [USA] d. (12)Grosjean | 6-3 6-2 6-2 | | 0.56 | 4.5% | 4.5% | 46.8% | 67.3% | 33.9% | 12/18 | 2:00 |
| 13‑Jan‑2003 | Australian Open | Hard | R16 | 16 | 73 | (12)Grosjean d. Felix Mantilla [ESP] | 3-6 2-6 6-3 6-3 6-3 | | 1.11 | 7.2% | 2.2% | 43.5% | 71.7% | 47.4% | 11/19 | 3:37 |
| 13‑Jan‑2003 | Australian Open | Hard | R32 | 16 | 30 | (12)Grosjean d. (24)Nicolas Lapentti [ECU] | 6-1 6-3 6-3 | | 1.29 | 7.9% | 1.0% | 54.5% | 70.9% | 52.2% | 8/9 | 2:15 |
| 13‑Jan‑2003 | Australian Open | Hard | R64 | 16 | 80 | (12)Grosjean d. Karol Kucera [SVK] | 7-6(2) 2-6 6-3 7-6(1) | | 1.16 | 3.4% | 1.7% | 50.4% | 80.0% | 57.6% | 2/6 | 3:05 |
| 13‑Jan‑2003 | Australian Open | Hard | R128 | 16 | 75 | (12)Grosjean d. Fernando Meligeni [BRA] | 6-4 6-2 6-3 | | 1.80 | 3.9% | 2.6% | 63.6% | 79.6% | 71.4% | 1/1 | 1:48 |