| 29‑Sep‑2003 | Tokyo | Hard | R64 | 104 | 139 | Robert Kendrick [USA] d. Arthurs | 7-6(3) 6-4 | | 0.88 | 16.4% | 5.5% | 68.5% | 78.0% | 43.5% | 6/7 | 1:18 |
| 22‑Sep‑2003 | Shanghai | Hard | SF | 118 | 12 | (1)Jiri Novak [CZE] d. Arthurs | 6-7(7) 6-3 6-2 | | 0.86 | 12.9% | 5.9% | 68.2% | 72.4% | 55.6% | 3/6 | 1:43 |
| 22‑Sep‑2003 | Shanghai | Hard | QF | 118 | 88 | Arthurs d. Ivo Karlovic [CRO] | 6-4 3-6 7-6(2) | | 1.10 | 14.8% | 2.5% | 60.5% | 83.7% | 71.9% | 1/2 | 1:40 |
| 22‑Sep‑2003 | Shanghai | Hard | R16 | 118 | 212 | Arthurs d. (LL)Takao Suzuki [JPN] | 6-1 6-2 | | 1.57 | 26.9% | 11.5% | 59.6% | 80.6% | 47.6% | 1/1 | 0:51 |
| 22‑Sep‑2003 | Shanghai | Hard | R32 | 118 | 152 | Arthurs d. (LL)Peter Luczak [AUS] | 5-7 6-4 6-2 | | 1.25 | 34.2% | 6.3% | 58.2% | 91.3% | 54.5% | 2/3 | 1:36 |
| 25‑Aug‑2003 | US Open | Hard | R128 | 118 | 8 | (8)Rainer Schuettler [GER] d. Arthurs | 4-6 6-3 6-2 6-4 | | 0.64 | 16.8% | 4.4% | 61.1% | 72.5% | 45.5% | 9/13 | 2:05 |
| 11‑Aug‑2003 | Cincinnati Masters | Hard | R64 | 118 | 14 | David Nalbandian [ARG] d. (Q)Arthurs | 6-0 6-4 | | 0.33 | 18.2% | 6.8% | 50.0% | 59.1% | 45.5% | 2/6 | 0:47 |
| 21‑Jul‑2003 | Kitzbuhel | Clay | R64 | 92 | 64 | Nicolas Lapentti [ECU] d. Arthurs | 7-6(8) 6-3 | | 0.82 | 10.3% | 5.2% | 51.7% | 76.7% | 75.0% | 2/3 | 1:25 |
| 7‑Jul‑2003 | Gstaad | Clay | R32 | 91 | 8 | (2)Rainer Schuettler [GER] d. Arthurs | 6-2 6-3 | | 0.30 | 7.0% | 10.5% | 45.6% | 69.2% | 38.7% | 9/12 | 0:59 |
| 23‑Jun‑2003 | Wimbledon | Grass | R64 | 77 | 14 | (13)Sebastien Grosjean [FRA] d. Arthurs | 6-3 6-4 6-7(12) 6-3 | | 0.87 | 13.1% | 3.7% | 54.2% | 82.8% | 63.3% | 1/4 | 2:20 |
| 23‑Jun‑2003 | Wimbledon | Grass | R128 | 77 | 63 | Arthurs d. Alberto Martin [ESP] | 7-6(3) 6-1 7-6(4) | | 1.69 | 23.3% | 2.2% | 60.0% | 85.2% | 66.7% | 1/1 | 1:54 |
| 16‑Jun‑2003 | Nottingham | Grass | QF | 64 | 97 | (Q)Hicham Arazi [MAR] d. Arthurs | 6-4 6-3 | | 0.62 | 9.2% | 10.8% | 55.4% | 72.2% | 41.4% | 3/6 | 1:06 |
| 16‑Jun‑2003 | Nottingham | Grass | R16 | 64 | 22 | Arthurs d. (1)Younes El Aynaoui [MAR] | 6-4 7-6(6) | | 2.39 | 19.6% | 1.8% | 67.9% | 92.1% | 77.8% | 0/0 | 1:04 |
| 16‑Jun‑2003 | Nottingham | Grass | R32 | 64 | 303 | Arthurs d. (Q)Bob Bryan [USA] | 7-6(17) 7-5 | | 1.37 | 28.2% | 3.8% | 66.7% | 86.5% | 69.2% | 0/0 | 1:21 |
| 9‑Jun‑2003 | Queen's Club | Grass | R64 | 57 | 81 | Antony Dupuis [FRA] d. (16)Arthurs | 6-4 7-6(8) | | 0.82 | 18.5% | 6.2% | 60.5% | 69.4% | 56.3% | 3/5 | 1:29 |
| 26‑May‑2003 | Roland Garros | Clay | R128 | 57 | 47 | Radek Stepanek [CZE] d. Arthurs | 6-1 4-6 6-1 7-6(2) | | 0.64 | 14.9% | 7.5% | 54.5% | 68.5% | 41.0% | 10/15 | 2:20 |
| 19‑May‑2003 | Dusseldorf | Clay | RR | 58 | 17 | Alex Corretja [ESP] d. Arthurs | 3-6 7-5 7-5 | | 0.92 | 15.7% | 4.6% | 55.6% | 76.7% | 56.3% | 9/11 | 2:20 |
| 19‑May‑2003 | Dusseldorf | Clay | RR | 58 | 94 | Arthurs d. Todd Martin [USA] | 7-6(4) 7-5 | | 1.61 | 15.9% | 5.8% | 53.6% | 89.2% | 65.6% | 1/1 | 1:33 |
| 19‑May‑2003 | Dusseldorf | Clay | RR | 58 | 47 | Radek Stepanek [CZE] d. Arthurs | 7-6(1) 6-3 | | 0.89 | 12.7% | 9.1% | 43.6% | 79.2% | 51.6% | 0/2 | 1:35 |
| 12‑May‑2003 | Hamburg Masters | Clay | R64 | 55 | 76 | (LL)Karol Beck [SVK] d. Arthurs | 6-4 3-6 6-3 | | 0.85 | 13.2% | 9.2% | 56.6% | 74.4% | 51.5% | 2/6 | 1:24 |
| 5‑May‑2003 | Rome Masters | Clay | R64 | 54 | 9 | (8)Jiri Novak [CZE] d. Arthurs | 6-3 6-3 | | 0.57 | 13.8% | 8.6% | 51.7% | 80.0% | 35.7% | 4/7 | 1:03 |
| 28‑Apr‑2003 | Munich | Clay | R16 | 55 | 11 | (3)Sjeng Schalken [NED] d. Arthurs | 7-6(4) 6-3 | | 0.98 | 20.7% | 5.2% | 55.2% | 87.5% | 53.8% | 0/1 | 1:21 |
| 28‑Apr‑2003 | Munich | Clay | R32 | 55 | 101 | Arthurs d. Tomas Behrend [GER] | 7-6(4) 7-5 | | 1.14 | 32.9% | 3.9% | 63.2% | 83.3% | 53.6% | 3/3 | 1:32 |
| 14‑Apr‑2003 | Monte Carlo Masters | Clay | R64 | 50 | 3 | (1)Juan Carlos Ferrero [ESP] d. Arthurs | 6-4 6-1 | | 0.64 | 16.7% | 7.4% | 46.3% | 64.0% | 48.3% | 3/7 | 1:02 |
| 7‑Apr‑2003 | Estoril | Clay | R32 | 49 | 84 | Adrian Voinea [ROU] d. Arthurs | 3-6 7-5 7-6(1) | | 0.99 | 15.5% | 10.3% | 48.5% | 87.2% | 50.0% | 4/6 | 2:04 |
| 4‑Apr‑2003 | Davis Cup WG QF: SWE vs AUS | Hard | RR | 49 | 199 | Arthurs d. Joachim Johansson [SWE] | 6-3 3-6 7-6(4) | | | | | | | | | |
| 17‑Mar‑2003 | Miami Masters | Hard | R128 | 47 | 61 | (WC)Robby Ginepri [USA] d. Arthurs | 7-5 6-3 | | 0.58 | 14.8% | 8.2% | 45.9% | 71.4% | 45.5% | 3/6 | 1:05 |
| 10‑Mar‑2003 | Indian Wells Masters | Hard | R64 | 48 | 15 | (15)Rainer Schuettler [GER] d. Arthurs | 6-4 7-6(3) | | 0.73 | 14.1% | 7.7% | 50.0% | 69.2% | 51.3% | 2/4 | 1:37 |
| 3‑Mar‑2003 | Scottsdale | Hard | R32 | 48 | 32 | Wayne Ferreira [RSA] d. Arthurs | 7-5 6-7(5) 6-2 | | 0.71 | 13.7% | 3.9% | 57.8% | 74.6% | 41.9% | 6/10 | 1:50 |
| 24‑Feb‑2003 | Copenhagen | Hard | SF | 45 | 53 | (3)Karol Kucera [SVK] d. (2)Arthurs | 6-2 6-4 | | 0.19 | 3.8% | 1.9% | 57.7% | 86.7% | 22.7% | 1/4 | 1:00 |
| 24‑Feb‑2003 | Copenhagen | Hard | QF | 45 | 98 | (2)Arthurs d. Magnus Norman [SWE] | 6-7(7) 7-5 6-4 | | 1.05 | 20.0% | 4.5% | 55.5% | 82.0% | 57.1% | 2/2 | 2:17 |
| 24‑Feb‑2003 | Copenhagen | Hard | R16 | 45 | 117 | (2)Arthurs d. (WC)Andreas Vinciguerra [SWE] | 6-7(4) 6-4 7-6(6) | | 2.10 | 39.3% | 4.5% | 64.0% | 93.0% | 81.3% | 0/0 | 1:49 |
| 24‑Feb‑2003 | Copenhagen | Hard | R32 | 45 | 96 | (2)Arthurs d. Olivier Mutis [FRA] | 7-6(5) 6-2 | | 1.24 | 25.4% | 7.5% | 62.7% | 78.6% | 52.0% | 2/2 | 1:08 |
| 17‑Feb‑2003 | Rotterdam | Hard | R32 | 45 | 3 | (1)Juan Carlos Ferrero [ESP] d. Arthurs | 7-6(4) 7-6(5) | | 0.54 | 25.6% | 8.1% | 50.0% | 86.0% | 55.8% | 4/4 | 1:27 |
| 10‑Feb‑2003 | Marseille | Hard | R32 | 44 | 79 | Adrian Voinea [ROU] d. Arthurs | 6-4 7-6(4) | | 0.80 | 24.2% | 0.0% | 67.7% | 88.1% | 45.0% | 2/3 | 1:07 |
| 7‑Feb‑2003 | Davis Cup WG R1: AUS vs GBR | Clay | RR | 44 | 439 | Arthurs d. Miles Maclagan [GBR] | 4-6 6-1 6-4 | | | | | | | | | |
| 13‑Jan‑2003 | Australian Open | Hard | R64 | 52 | 34 | (28)Fabrice Santoro [FRA] d. Arthurs | 6-3 6-1 RET | | 0.29 | 2.2% | 6.7% | 64.4% | 51.7% | 56.3% | 2/6 | 0:48 |
| 13‑Jan‑2003 | Australian Open | Hard | R128 | 52 | 241 | Arthurs d. (Q)Marcos Daniel [BRA] | 6-7(5) 3-6 7-6(5) 6-4 6-4 | | 1.44 | 22.1% | 6.2% | 56.6% | 91.5% | 57.1% | 1/2 | 3:33 |