Manchester United forward Edinson Cavani managed to anger Villarreal staff before even coming on the pitch in the Champions League.
Ole Gunnar Solskjaer's side snatched a late 2-1 victory on Wednesday evening in front of a packed Old Trafford.
Thinks weren't going their way however and Villarreal took the lead at the start of the second half through Paco Alcacer.
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Cavani was sent to warm-up just before that goal and he immediately wanted to make an impact.
The Athletic have reported Cavani decided to warm-up near Villarreal's substitutes as a way to disrupt their momentum.
It angered manager Unai Emery, who likes his players to warm up in a specific and regimented way.
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Perfect way to make an impact. 34-years-old and always knowing what's going on.
Cavani did eventually come on for Paul Pogba and when he did, he displayed a remarkable level of work rate.
Heading into the final 10 minutes, players were starting to tire and Cavani sensed that with a lung-busting run.
Nemanja Matic's pass was wayward and Villarreal wanted to usher it out for a corner.
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Instead, Cavani came darting over and kept the ball in play for United to get on the attack once again.
Solskjaer praised his energy off the bench and the way Cavani managed to buoy the home fans.
"The energy that Edinson gave us, the crowd, he's exceptional," he told BT Sport per UnitedInFocus.
"Edi is always lively, he created chances, he pressed for us."
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Another player he was quick to praise is goalkeeper David de Gea.
He managed to keep United in it in the first half with a number of remarkable saves.
Solskjaer added: "He had a difficult summer after [the Europa League final loss] and went to the Euros where he didn't play.
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"He's really come back with a determination, belief and workrate that I've enjoyed.
"Again tonight he got his deserved outcome because he saved us. We have to be realistic and for me today, David deserves man of the match."
Featured Image Credit: BT SportTopics: Football, Manchester United, Villarreal, Champions League, Edinson Cavani