The final phase of the 2002–03 UEFA Cup began on 26 November 2002 with the first matches of the third round and concluded on 21 May 2003 with the final at the Estadio Olímpico in Seville, Spain. A total of 32 teams competed in this phase of the competition. Times up to 30 March 2003 (quarter-finals) were CET (UTC+1), and thereafter (semi-finals and final) CEST (UTC+2).
The draw for the third round was held in Geneva, while the remaining draws were held at UEFA headquarters in Nyon, Switzerland.[1]
| Round | Draw date | First leg | Second leg |
|---|---|---|---|
| Third round | 15 November 2002 | 28 November 2002 | 12 December 2002 |
| Fourth round | 13 December 2002 | 20 February 2003 | 27 February 2003 |
| Quarter-finals | 13 March 2003 | 20 March 2003 | |
| Semi-finals | 21 March 2003 | 10 April 2003 | 24 April 2003 |
| Final | 21 May 2003 at Estadio Olímpico, Seville | ||
Apart from the final, each tie was played over two legs, with each team playing one leg at home. The team that scored more goals on aggregate over the two legs advanced to the next round. If the aggregate score was level, the away goals rule was applied, i.e., the team that scored more goals away from home over the two legs advanced. If away goals were also equal, then thirty minutes of extra time (two fifteen-minute periods) was played. For the first time in an international football tournament, the silver goal system was applied, whereby the team who leads the game at the half-time break during the extra time period would be declared the winner. If the scores were still level after the initial 15 minutes of extra time play would continue for a further 15 minutes. The away goals rule was again applied after extra time, i.e., if there were goals scored during extra time and the aggregate score was still level, the visiting team advanced by virtue of more away goals scored. If no goals were scored during extra time, the tie was decided by penalty shoot-out.
In the final, which was played as a single match, if scores were level at the end of normal time, extra time was played. If, on completion of the first period of extra time, one of the teams had scored more goals than the other, the silver goal rule was applied, i.e., the match ended and that team was declared the winner. If no decisive goal was scored, the second period of the extra time was played, followed by a penalty shoot-out if scores remained tied.[2]
The mechanism of the draws for each round was as follows:[2]
The final phase involved 32 teams: the 24 teams which qualified from the second round, and the eight third-placed teams from the Champions League group stage.
| Third-placed teams from the Champions League group stage |
| Team | Team | Team | Team | ||||||
|---|---|---|---|---|---|---|---|---|---|
 Lazio | 106.334 | Panathinaikos | 57.058 | align=left bgcolor=#ccccff |  Lens | 44.176 | align=left bgcolor=#ccccff | Auxerre | 32.176 |
| align=left bgcolor=#ccccff | Liverpool | 79.729 | Stuttgart | 53.495 | align=left bgcolor=#ccccff |  Club Brugge | 41.762 | Vitesse Arnhem | 30.082 |
| Leeds United | 76.729 | Hertha BSC | 52.495 | PAOK | 41.058 |  Slovan Liberec | 29.312 | ||
 Celta Vigo | 76.233 | align=left bgcolor=#ccccff | AEK Athens | 52.058 | Anderlecht | 38.762 | Fulham | 27.729 | |
| align=left bgcolor=#ccccff | Lyon | 74.176 | Paris Saint-Germain | 51.176 |  Sturm Graz | 37.625 |  Beşiktaş | 26.362 | |
| Porto | 66.124 | Real Betis | 49.233 | Boavista | 36.124 |  Wisła Kraków | 21.750 | ||
| Bordeaux | 63.176 | Slavia Prague | 47.312 | Celtic | 36.062 | align=left bgcolor=#ccccff |  Maccabi Haifa | 18.666 | |
| align=left bgcolor=#ccccff |  Dynamo Kyiv | 59.979 | Schalke 04 | 46.495 | Málaga | 34.233 | Denizlispor | 14.362 |
The 32 teams were distributed into two groups of eight teams, each containing four seeded and four unseeded teams. The draw was held on 15 November 2002 in Geneva, Switzerland.[3]
The first leg was played on 26 and 28 November, and the second leg was played on 10 and 12 December 2002.|}
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Wisła Kraków won 5–2 on aggregate.----Panathinaikos won 3–2 on aggregate.----Denizlispor won 1–0 on aggregate.----Hertha BSC won 2–1 on aggregate.----Beşiktaş won 3–1 on aggregate.----Auxerre won 2–1 on aggregate.----Lazio won 3–2 on aggregate.----Stuttgart won 3–1 on aggregate.----Anderlecht won 4–2 on aggregate.----Slavia Prague won 4–1 on aggregate.----AEK Athens won 8–1 on aggregate.----Liverpool won 2–0 on aggregate.----Málaga won 2–1 on aggregate.----2–2 on aggregate. Celtic won on away goals.----Porto won 3–1 on aggregate.----2–2 on aggregate. Boavista won on away goals.
The 16 teams were distributed into two groups of eight teams, each containing four seeded and four unseeded teams. The draw was held on 13 December 2002 in Nyon, Switzerland.[4]
The first leg was played on 20 February, and the second leg was played on 27 February 2003.|}
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Beşiktaş wins 4–3 on aggregate.----Málaga won 1–0 on aggregate.----Celtic won 5–4 on aggregate.----Porto won 8–3 on aggregate.----Panathinaikos won 3–2 on aggregate.----Liverpool won 3–0 on aggregate.----3–3 on aggregate. Boavista won on away goals.----Lazio won 5–4 on aggregate.
The draw was held on 13 December 2002 in Nyon, Switzerland. The first leg was played on 13 March, and the second leg was played on 20 March 2003.|}
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Porto won 2–1 on aggregate.----Lazio won 3–1 on aggregate.----Celtic won 3–1 on aggregate.----1–1 on aggregate. Boavista won 4–1 on penalties.
The draw was held on 21 March 2003 in Nyon, Switzerland. The first leg was played on 10 April, and the second leg was played on 24 April 2003.|}
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Porto won 4–1 on aggregate.----Celtic won 2–1 on aggregate.
See main article: 2003 UEFA Cup final.