Celtic appear to have taken a thinly-veiled social media swipe at Rangers on the 18th anniversary of the UEFA Cup Final in Seville.
Back in 2003 an estimated 80,000 Hoops diehards made the journey to Spain as Martin O'Neill's charges took on Jose Mourinho and Porto.
It wasn't to be in the end with a 3-2 extra time victory handing Mourinho his first European trophy one year before he'd shock the world in the Champions League.
But, result aside, fans look back on that day with fond memories and their conduct in the Andalusian capital was roundly praised with FIFA giving the club a Fair Play Award.
The anniversary comes as Glasgow picks the bones from a weekend of mayhem that saw Ibrox supporters scrapping in the city centre after their team lifted the Premiership title with several police officers sustaining injuries.
Rangers slammed the "small minority of fans" who "besmirched the great name" of the club in a statement.
But now their arch rivals seem to have responded in kind with a crafty Tweet.
On Friday morning, Celtic made reference to an old supporters' chant when they posted: "You can take us anywhere, we won’t let you down.
"80,000 #CelticFC supporters travelled to Seville for the UEFA Cup Final 18 years ago today! FIFA Fair Play Award for our supporters"
