He's looked of it but I think it's to do with the players around him and the system. He was better with McGree against Cameroon.
Despite being defensive he looked better against Turkey. It's the players around him. He had a shabby Okon and an invisible Velupillay. He had one of two moments against the USA.
He was very energetic against Mexico and had late cameo against Switzerland. I don't think it's fitness. It's more the system, match situation and surrounding players that hinders his best traits.