I remember him going on some BBC chat show that John Inverdale was hosting. The England cricket team had just been humped in their last test series and Inverdale was giving Nasser Hussain (captain at the time) a really hard time, obnoxiously so.
Vialli came on and Inverdale decided to humiliate Hussain a bit more by asking the Italian footballer how we should solve the England cricket team’s problems.
Vialli told him that with more players of Hussain’s character who would front up to the type of questioning he’d just been subjected to, they would be just fine.
Class act. Put Inverdale right in his place, threw his weight behind a fellow sportsman and had a potentially hostile audience (mostly non-Chelsea fans) eating out of his hand in an instant.
EDIT - on YouTube, about 12 minutes in.