The 2003–04 season was Fussball Club Basel 1893's 111th in existence and the club's 10th consecutive season in the top flight of Swiss football. The Club's main aims for the 2003–04 season were to regain the league title and, as cup holders, to retain their cup title. The third aim was to remain in the UEFA Cup as long as possible. During pre-season Basel won the Uhrencup and the Alpen Cup. After being the surprise package in Europe in the 2002–03 season, Basel could not bring this form into the UEFA Cup in 2003–04 as they were eliminated by Newcastle United in the second round after defeating Malatyaspor in the previous round. The Super League season started impeccably, Basel won the first thirteen matches straight off. They completed the first half of the season undefeated, with seventeen wins and one draw. Basel remained in top position right up until the end of the season, thus achieving their championship aim. In the club's history this was their tenth championship title.
Basel's priority aim for the season was to win the league championship. The season started impeccably, Basel won the first thirteen matches and moved to the top of the league table from the first round. They completed the first half of the season undefeated, with seventeen wins and one draw. Basel completed the seasons eighteen home ties undefeated, winning fourteen and drawing four. Their biggest home wins were to 6-0 wins against Servette and Neuchâtel Xamax. Four home games were reported as sold out, the highest attendance being 30,800 spectators on 23 November 2003 in their highest scoring match of the season, a 5–2 win against Grasshopper. Basel remained in top position in the table until the end of the season, thus achieving their championship aim. This was the club's tenth championship title.
Domestic Cup
As cup holders, Basel's clear aim for the Swiss Cup was to retain the title. In the first two rounds of the 2003–04 Swiss Cup Basel were drawn away games against lower league teams. Both games were won as expected. In the third round they were drawn away in the Hardturm Stadion against Grasshopper Club Zürich but lost 1-0. Thus Basel were eliminated and missed their domestic cup aim.
Europe
The clubs aim was remain in the UEFA Cup as long as possible. But after being the surprise package in Europe in the 2002–03 season, Basel could not bring this form into the UEFA Cup in 2003–04 and they were eliminated by Newcastle United in the second round after defeating Malatyaspor in the previous round.