The Intertoto Cup was a terrible summer tournament that fell under UEFA's control in the 1990s. Palace entered it once, in the third round, and lost home and away to Turkish club Samsunspor. The Eagles have never played in any other European competition.
The Hornets finished runners up to Liverpool in the 1983 First Division, and beat German club Kaiserslautern 3-0 at Vicarage Road to overturn a first leg deficit of 3-1 in the early rounds of the following season's UEFA Cup.