Proven where? International stage? Serie A?
Certainly not proven in the Premier League for a title contender. In that role he was a failure for twice before already. Third time the charm now.
Some players just don't fit the Premier League very well. It's normal. I don't really get why you need to keep forcing something that clearly doesn't fit. There are lots of great strikers around and 99% of them would love to join Chelsea AND be available for less than 100 million.
I’m not sure I can fault him during his first stint at Chelski. He was young and frankly not given much of a chance at all by a manager known for not giving young players chances.
And I wouldn’t call ManUre a ‘title contender’ before, during, or after his time there so not really understanding that reference. Plus his goal scoring numbers there weren’t too far off his Everton ones.
And this season he started off well. He wasn’t scoring a lot but he was incredibly disruptive to opposing defenses and drawing a ton of attention, which opened up lots of space for everyone else and the team was doing very well. And then he got hurt and it was never the same and then the interview came out and that was pretty much the end.
He is a player who needs to be the focal point and he was that at Everton and Inter and he thrived at both. If not he can tend to drift out of games.