2003–04 European Challenge Cup Round 1 Aggregate Results

| Winners | Match_points | Aggregate_score | Points_margin | Losers |
|---|---|---|---|---|
| Bath | 4 – 0 | 125 – 11 | 114 | L`Aquila |
| Montferrand | 4 – 0 | 113 – 3 | 110 | Leonessa |
| Saracens | 4 – 0 | 127 – 18 | 109 | Rugby Roma |
| Castres Olympique | 4 – 0 | 128 – 24 | 104 | Rovigo |
| Newcastle Falcons | 4 – 0 | 137 – 37 | 100 | Valladolid RAC |
| NEC Harlequins | 4 – 0 | 94 – 21 | 73 | El Salvador |
| Grenoble | 4 – 0 | 76 – 16 | 60 | Gran Parma |
| Glasgow | 4 – 0 | 68 – 24 | 44 | Montpellier |
| Colomiers | 4 – 0 | 75 – 32 | 43 | Petrarca Padova |
| Narbonne | 4 – 0 | 52 – 23 | 29 | Rotherham |