You have 7 minutes to answer as many as you can!
Back in 2001, Leeds United reached the semi-final of the UEFA Champions League, in a campaign which saw the Whites defeat 1860 Munich, AC Milan, Besiktas, Lazio, Anderlecht, Deportivo La Coruna and draw against Barcelona.
David O'Leary used 27 players across 17 games, but we want to know, how many of them can you name! To make things a bit more interesting and because it's a little bit easier than our previous challenges, we're reducing the time down to 7 minutes!
Once you're done, head over to the Leeds United social channels and tell us how many you managed to get!