The 2003 UEFA Cup Final was played on 21 May 2003 between Celtic of Scotland and Porto of Portugal. Porto won the match 3–2 in extra time thanks to a goal from Derlei. This was also the first game to use the silver goal rule, although it did not affect the outcome of the game as Porto scored in the second half of extra-time, thus meaning the game had to be played until the end of extra-time.

The Celtic Football Club, commonly known as Celtic, is a professional football club in Glasgow, Scotland. The team competes in the Scottish Premiership, the top division of Scottish football. The club was founded in 1887 with the purpose of alleviating poverty in the Irish–Scots population in the city's East End area. They played their first match in May 1888, a friendly match against Rangers which Celtic won 5–2. Celtic established themselves within Scottish football, winning six successive league titles during the first decade of the 20th century. The club enjoyed their greatest successes during the 1960s and 70s under Jock Stein, when they won nine consecutive league titles and the 1967 European Cup. Celtic have played in green and white throughout their history, adopting in 1903 the hoops that have been used ever since.