Hector Bellerin did not know the score after collision with goalscorer Marcos Alonso during Chelsea vs Arsenal
Spanish full back was struck with an unintentional elbow before hitting his head on the turf as he came crashing down
ARSENAL defender Hector Bellerin did not know the score after Marcos Alonso caught him with an elbow while scoring Chelsea's controversial opener.
There was concern at Stamford Bridge as the defender - who also hit his head on the ground - was taken off as a precaution.
And Gunners boss Arsene Wenger was not happy with the decision as his side slumped to a 3-1 defeat.
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He said: “It was 100 per cent a foul. It was even dangerous play. Bellerin was concussed.
“Not completely knocked out. He didn't know the score at the time. He didn't see the goal.
“One of the peculiarities of the game today is that referees are much more severe with tackles on the ground and let much more go with elbows in the face.
“It's not only today, but in many, many games I see that. But it's more dangerous to hit the head than the legs.”
Chelsea took the lead after 13 minutes when Diego Costa's header hit the bar and the ball looped down and Alonso towered over Bellerin to head home.
It was a 50-50 challenge and the ball was there to be won but as Alonso leaped, his elbow struck Bellerin in the face.
Arsenal teammates Shkodran Mustafi and Petr Cech gave Bellerin attention as he looked dazed on the turf at Stamford Bridge.
Before a member of Arsenal's medical team rushed to his attention before he was then substituted for Gabriel.
Speaking on , ex-England international Danny Mills believes Bellerin should be stronger.
He said: "Fantastic cross into the box, pinpoint perfect for Diego Costa.
"His header is straight off the cross bar but I tell you what, Alonso bullies Bellerin out of the way, it's a fantastic header. He's more determined, it's real top quality play from Alonso.
"But as a defender, Bellerin has to be stronger in his own six-yard box."
Supporters on Twitter were amazed a foul was not given, arguing that if the incident took place anywhere else on the pitch, play would have been stopped.