Leeds winger Aidy White knows how big a part historical rivalry will play when his side meet Chelsea in the quarter-finals of the Capital One Cup.
United have been drawn to play the European Champions at Elland Road on December 19 - the first time they will have faced each other since Leeds' final game in the Premier League in 2004.
Since then the clubs' fortunes have differed, with Chelsea's riches taking them to titles at home and abroad, while Leeds have struggled to make it back to the big time.
There has never been any love lost between the two, though, with a mutual dislike dating back to the 1970s.
"There is a lot of history and there is bound to be a full house at Elland Road," Republic of Ireland Under-21 international White said.
"It will be a fantastic occasion. I don't think there are many places to rival Elland Road when it's full.
"I was a young lad when we were last playing Chelsea, but our fans still sing about them now, it's hard not to notice it when it happens most games."