David Luiz wasn't able to head the ball after collision with Jimenez - Arteta reveals reason he substituted his most experienced defender

Mikel Arteta says David Luiz was substituted at half-time in Arsenal's Premier League match against Wolves because he felt "uncomfortable" following a head collision with Raul Jimenez.

The Arsenal centre-back was left bleeding and required a bandage after he clashed heads with the striker as they challenged for a cross in the Wolves box.

Jimenez had to be stretchered off the field as a result of the injury, having been knocked unconscious, but Luiz was able to keep playing.

The  33-year-old was substituted during the break, however, with Rob Holding called on to take his place in the Gunners' defence.

"I was shocked [at the collision] because I saw the reaction of the players," he told BBC Sport. "They were asking the doctors. We knew David Luiz was OK, it was just a cut. Raul Jimenez looked pretty bad.

"The doctor did all the tests and protocols to make sure the player [Luiz] was safe to continue. David was just worried about his cut, he never lost consciousness. He couldn't really head the ball, he was uncomfortable - nothing else - so we took him off."