Diogo Jota scolded one of his team-mates during Liverpool's 3-1 win over Fulham on Sunday.
The Portugal star was making his first start since recovering from a knee injury suffered back in February, and marked the appearance by scoring Liverpool's third goal at Craven Cottage.
Ryan Gravenberch had earlier netted his first Liverpool goal since signing from Bayern Munich in the summer to make it 2-1, after Timothy Castagne had equalised on the stroke of half-time for Marco Silva's side.
The goal of the game, though, belonged to Trent Alexander-Arnold, who curled a right-footed free kick into the top left corner from 25 yards to give Liverpool the first half advantage.
The number 66 then celebrated amid a chorus of boos from the Fulham supporters, who had earlier jeered former Cottagers youngster Harvey Elliott.
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Alexander-Arnold responded by performing a 'shush' celebration towards the home spectators as he was congratulated by his team-mates.
Unseen footage, though, shows Jota tapping the defender on his forehead as if to warn him against continuing the celebration.
Any indignation didn't last for too long, though, with Jota then going on to seal Liverpool's victory in the second half and take them back level on points with Arsenal at the top of the Premier League table.
Speaking after the game, Jota said: "I have to say it was a bit childish from our side, the way we conceded.
"We had the chance to do it [control the game] with a couple of goal kicks, we tried to play fast, I don't think that was a clever thing to do. And we conceded.
"That's football, that's the Premier League. But I'm really pleased with the way we reacted, and the way we played and controlled the game in the second half.
"I was waiting for my chance for the whole game until that point [of the goal]. I knew I was probably not going to [play] all the game because I'm just coming back after around three months. Really important for me that I took my chance today."
Topics: Diogo Jota, Liverpool, Premier League, Football, Fulham
Ryan Smart