Austria Vienna president Thomas Parits has remarked that Athletic Bilbao are still licking their wounds after the Austrian side eliminated los Leones in the Round of 32 in the 2005 UEFA Cup.
The two sides meet on Thursday night at San Mames, and Parits is aware that the Basque side will want to avenge the defeat.
"Athletic have not forgotten the embarrassment of 2005, when we knocked them out of the UEFA Cup. Now they are happy that they can have revenge," he told Marca.
While Parits knows that los Leones will have this extra motivation, he added that his team were coming up against one of Spain's great clubs.
"Athletic are one of the 'dinosaurs' of the Primera Division, because they are one of the only teams that have never been relegated alongside Real Madrid and Barcelona.
"It is a club that has always followed its own philosophy, using only Basque players, which is a remarkable achievement in such a strong league."
Anthony Wright, Goal.com