His legs are going and he can't adjust his style. The game looks too quick for him.
We always see glimpses of the brilliance - He sees passes others don't, makes some great runs and can still be decisive but there's just something off - He's easily chased down, crowded out and can't create the time and space to do his usual thing. Yes it's the first game but he can't have many more like this or he'll have to be dropped. I've been trying hard to put last season's struggles down to physical exhaustion, lack of cohesion but he's just been so individually poor for so long, spanning back to his last days at Arsenal, which were put down by most to him wanting to leave.
It's not looking good at all. Sadly.