There is a player at Napoli, Zielinski. I think he is 26 now? Anyway, when he plays, you can see he is a genius. Ancelotti & Gattuso have praised him like crazy, Klopp wanted him at Liverpool 3 years ago. Gattuso recently said he could be one of the best.
Anyway, he almost always disappoints. Scores goals, gets assists, but he could do so much more. You could see that he is brilliant, technically second to none, but there must be a mental block or something. He has to play, because you can't drop a talent like that, but I am sure you could get a worse player to put in a better shift than him.
Funnily, he plays the same role as Barkley and I fear Barkley is the same. You can see the spark, the touch, the pass, but my God does he disappoint.
It's so annoying because everyone can see what he can do, he just doesn't turn it on very often. I'm afraid he is not capable of doing it.