However, he believes that Martin O'Neill's team can still rely on a special European atmosphere against Celta Vigo.

The Portuguese striker, one of only three players to have donned both clubs' jerseys, thinks the upcoming Europa League clash could rekindle some of the magic that once made Celtic Park a formidable fortress in football.

Cadete, who remains a fan favourite in Glasgow after scoring 31 goals in 45 games, will be watching the match with mixed loyalties against his former Spanish side.

The 58-year-old said: "The atmosphere isn't the same as it was when I played there, but I'm sure that in a European competition match, some of that old atmosphere will be felt once again."

Cadete recalls the unforgettable nights under the lights in Glasgow and believes that the arrival of Celta could help revive the kind of occasion that once left visiting teams quaking in their boots.

The former striker also highlighted the special connection between the two clubs' supporters, stating that there's a deeper bond between the Celtic and Celta fanbases than seen in most European fixtures.

As for who he'll be rooting for, Cadete couldn't pick a side.

He said that his fondness for both clubs and their fans means he would struggle to celebrate a victory for either team.