Such is the demand for tickets from travelling fans for Shamrock Rovers' visit to Chelsea on Thursday night, that home supporters have been warned they face a ban from Stamford Bridge should their tickets fall into Irish hands.
But while the Hoops' run to the Uefa Conference League knock-outs is breaking new ground for the League of Ireland, their visit to west London this week is far from their first glamour tie in European competition.
Indeed, the Dublin club have a rich history of taking on some of the game's best over the years.
They were the first from their domestic league to take part in what was then the European Cup, with that piece of history coming against none other than the Manchester United side of Matt Busby.