Chelsea interim manager Frank Lampard has confirmed Kalidou Koulibaly, Marc Cucurella, Reece James and Mason Mount are unavailable for selection against Arsenal due to injuries.

“Kouli is out for a while still,” Lampard said. “I think it will be a tight call for the season to be fair. He’s working away.

“I’ve been impressed with him actually. He’s a professional, he’s doing his job very well, but unfortunately the injury was a bit of a tough one.

“Cucurella will probably be another two weeks or so. It was a two or three week injury when he first did it a week or so ago. Mason and Reece are the same, there’s no update on them.”