Nicolo Barella was given a straight red card during Inter Milan's Champions League clash against Real Madrid on Tuesday evening.
The Spaniards took the lead in the 17th minute after a wonderful goal from Toni Kroos.
The score was still 1-0 to Los Blancos when Inter were reduced to 10-men in the 64th minute.
Barella was sent into the advertising hoardings after a tussle with Eder Militao.
The Italian midfielder rolled towards the Brazilian and then punched him in the leg.
He was shown his marching orders, to both his and his teammates' dismay.
Watch the moment below...
That is just brainless from Barella. He really can have no complaints.
He will now miss the first game of Inter's Champions League last-16 first leg.
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Real would go on to win 2-0 as they made their numerical advantage count.
Marco Asensio scored a screamer 15 minutes after Barella had been sent off as Real confirmed themselves as Group D winners.
Simeone Inzaghi later revealed that Barella had apologised for his moment of madness.
He said, per football-italia: “Barella made a serious mistake, but he is intelligent, he recognised his error and apologised to the staff, his teammates, everyone. The game was still open at 1-0, it will help him to grow and hopefully this means it won’t happen again.”
Inter will now go into the last-16 knowing a very tough tie awaits them. Liverpool, Manchester City and Bayern Munich are among the teams that they could draw.