2002–03 Beşiktaş J.K. season

The 2002–03 season was the club's 44th season in the Turkish Super League and the club's 100th year in existence. After signing Romanian manager Mircea Lucescu, Beşiktaş won the league for the 12th time in club' history. Beşiktaş also had their most successful UEFA Cup run, by becoming a quarter finalist, however the club lost to S.S. Lazio 1–3 on aggregate, therefore eliminating them. Beşiktaş lost to Gençlerbirliği 3–4 in the quarterfinals of the Turkish Cup.

Squad

 * Source:

Turkish Cup
Beşiktaş had a bye in the first round and then played Elazığspor in the second round. Beşiktaş lost to Gençlerbirliği in the quarter finals.

UEFA Cup
Beşiktaş had their most successful run, by becoming a quarter finalist. In doing so, they became the second Turkish team to achieve the feat (Galatasaray achieved it in 2000).

First round
Beşiktaş won 7–2 on aggregate.

Second round
Beşiktaş won 2–1 on aggregate.

Third round
Beşiktaş won 3–1 on aggregate.

Fourth round
Beşiktaş won 4–3 on aggregate.

Quarter-final
Beşiktaş lost 1–3 on aggregate.