I think he's tired with the schedule and the pace of the games. He spends most of the game sitting where Carrick usually does and he can't get onto a through ball to save his life. I know he's hardly Gareth Bale but he just seems lethargic. He even said he was feeling tired around Christmas. We have so much pace with Mkhi, Rashford, Martial etc and a tired Zlatan just doesn't really fit in. He needs to rest for a few weeks I think.