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:
1. Nigel Martyn
The 53-year-old swapped football for cricket following his retirement in 2006. Listen to this - he now plays cricket at Knaresborough XI with former Whites goalkeeper and teammate Paul Robinson! Photo: Stu Forster
2. Danny Mills
Mills often appears on BBC Five 5, though has also done media work for the likes of Sky Sports and TalkSPORT. Away from football, he runs a property business and is on the advisory board for a private equity firm. Photo: Stu Forster
3. Rio Ferdinard
Ferdinard has launched his own clothing range called FIVE and works as a pundit for BT Sports. The former defender also established his own charity in 2012 - the Rio Ferdinand Foundation. Photo: Stu Forster
4. Dominic Matteo
The 46-year-old received life-saving surgery on a brain tumour at Leeds General Infirmary last November before undergoing radiotherapy. Matteo spoke to the YEP in July about the challenges facing him during his recovery. Photo: Jamie McDonald
5. Ian Harte
Harte works as a football agent for YMU agency, representing the likes of former Whites Jack Clarke and Kemar Roofe, alongside his business ventures with a nutrition company Herbalife. Photo: Phil Cole
6. Eirik Bakke
Bakke is settled back in his homeland of Norway and has entered his fifth year as head coach of Sogndal FC, who play in the second division and are currently fourth in the league table. Photo: Ben Radford