Manchester United’s Nemanja Matic used the absence of VAR to land a sly dig on Vladimir Coufal.
Red Devils midfielder Matic attempted to take the ball from Coufal, and he was unsuccessful.
Matic was immediately thrown to the ground by West Ham’s player. The incident was missed by Jonathan Moss, the referee.
Moss could not review the incident as there was no VAR for the Carabao Cup.
The sly gesture was noticed by Twitter fans who quickly condemned the actions of the midfielder.
“Gotta say that’s a red for Matic. Completely unnecessary and intentional,” one fan tweeted after seeing the incident.
Another added: “The worst part about this – and there are many – is it’s next to where the fourth official should be stood. How on earth is this not spotted?”
“Matic knees him in nuts on purpose and commentary don’t even care wtf @SkySports YOU ARE A JOKE,” a third responded.
While a fourth fumed: “He should get suspended for this.”
However, others saw the lighter side of the challenge: “Man just kneed his nuts,” one fan added with a laughing emoji.
Is Matic worthy of a red card? Let us know in the comments section
In the first half, it had been the Manchester United faithful calling out for the inclusion of VAR.
Mark Nobel appeared to have caught Jesse Lingard who was pressing down on the goal line. Moss waved play on.
This was United’s latest moment of frustration after Ole Gunnar Solskjaer had lost the game early.
United fans lashed out at Alex Telles after Ryan Fredericks left him for dead before the Englishman placed it on a plate for Manuel Lanzini.
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Andriy Yanmolenko missed a golden opportunity to end the tie in the 85th minutes when he made the post.
United won the Premier League match against West Ham on Sunday, but it was too late.
United took Lingard 40 attempts to score the goal in stoppage time and David De Gea 40 to save his penalty to win all three points.
The cup was not won.