ITV commentator Clive Tyldesly expressed his outrage at the sight of Arsenal's Mesut Ozil swapping shirts at half-time with Monaco's Geoffrey Kondogbia in their Champions League Last 16 tie second-leg tie at Stade Louis II.
"I don't quite know why we are seeing this," he said in anger.
It was Ozil's very own 'Andre Santos' moment - the much-maligned Brazilian left-back swapped shirts at the break with former Gunner, then at Manchester United, Robin van Persie in 2012 at Old Trafford.
Ozil tweeted his disappointment after the game, as the Gunners won 2-0 but were knocked out on away goals after Monaco won the first leg 3-1.
Here are some of the best tweets on the shirt swap:
The Gunners are next in action against Newcastle in the Premier League on Saturday.
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