Following a 0-0 draw at Elland Road in the first leg, the La Liga outfit proved too much to handle in the return meeting as they ran out 3-0 winners.
And we've taken a trip down memory lane to find out where each player who featured that night in Spain are now. Scroll and click through the pages:
7. Olivier Dacourt
French TV channel Canal+ employ Dacourt as a pundit, though he has recently started making football documentaries, which involves interviewing high-profile stars about difficulties and issues away from football. Photo: Laurence Griffiths
8. David Batty
Batty appeared in one of Leeds United’s Clap for our Carers videos, but before that was rarely spotted since he retired from football. He is, however, vice-president of Harrogate Town, who were promoted to League Two last week. Photo: Shaun Botterill
9. Harry Kewell
Having been out of the game for two years, Kewell returned to management on August 1 with League Two side Oldham Athletic. He previously had spells in the dugout at Crawley Town and Notts County. Photo: Stu Forster
10. Mark Viduka
Viduka has reportedly moved to his parent’s birthplace of Croatia and owns a coffee shop in the Croatian capital, Zagreb. He has also coached at Australian club Melbourne Knights. Photo: CHRISTOPHE SIMON
11. Alan Smith
Smith hung up his boots in 2018 and swapped life in England for the USA. He now coaches young players in Florida and enjoys a spot of surfing from time to time. Photo: Stu Forster