Mikel Arteta slammed Nicolas Pepe, branding his red card for head-butting Ezgjan Alioski unacceptable.
Pepe saw red for a second-half, off-the-ball moment of madness when he responded to provocation from the Leeds midfielder.
Arsenal manager Arteta said: ‘It’s unacceptable. I told him it’s unacceptable. We knew the level of intensity, aggression and how alive they [Leeds] are in every action.
Mikel Arteta slammed Nicolas Pepe (above) for picking up a reckless red card at Leeds
The Ivorian (left) was adjudged to have headbutted Ezgjan Alioski (second right) at Elland Road
‘You need to be able to deal with that because it’s part of the plan against this team.