I think you'll find, that before the competition became the UEFA Cup, it was called the INTER CITIES FAIRS CUP, and the final was played over two legs.
UEFA didn't recognise the winners of the inter cities fairs cup before UEFA Cup started, possibly because most of the winners happened to be English teams, typical UEFA.
UEFA didn't recognise the winners of the inter cities fairs cup before UEFA Cup started, possibly because most of the winners happened to be English teams, typical UEFA.
From england won Newcastle, Arsenal, Leeds (x2).
From spain won Barcelona (x3), Valencia (x2), Real Zaragoza.