Celtic fans have been accused of leaving a landmark Madrid square looking like a rubbish dump ahead of their team's 5-1 Champions League hammering.
Spaniards kicked the visiting supporters while they were down on Thursday by describing the scene they had left in the Plaza Mayor as 'terrible.'
Fans packed into the square in the heart of the Spanish capital in the run-up to Wednesday's night's match and spent the afternoon singing and snacking as they downed lager from cans they had brought from nearby supermarkets, convenience stores and street sellers.
And although there were no reports of any major public order problems, the mess the supporters left behind them appears to have made a lasting impression on their hosts.
Spanish TV reporter Alberto Catalan described the square as a pigsty in a video he posted on his Twitter.
Veteran diplomat Juan Manuel Molina said Madrid's politicians should hang their heads in shame for allowing 'drunken tourism' to take over one of the city's most emblematic monuments.
Another Spanish journalist, Juan Ignacio Barrero, added alongside footage of the lager cans, plastic bags and empty glasses littering the floor of the square: 'Let's just say that our Celtic friends didn't leave the Plaza Mayor looking very nice.'
Regional TV broadcaster Telemadrid accused the Celtic fans of abandoning a 'crime scene' by leaving 'hundreds of plastic bags, broken bottles and other "organic residue" resulting from the heavy consumption of beer and other alcohol, with its unmistakable smell.'
The complaints flooded in as Celtic fans headed back home after their comprehensive defeat at the hands of reigning champions Real Madrid.
Celtic missed a penalty and conceded from two as their Champions League campaign ended.
Second-half goals from Marco Asensio, Vinicius Junior and Federico Valverde took the game well beyond the Scottish side.
Pundit and former Real Madrid player Steve McManaman also used the word 'rubbish' - to describe the decision to award the Spanish giants their first-half penalties for handball rather than the mess left by some of the travelling fans.