What makes u think he is entering twilight of his career? He is 30yo who never really relied on dynamism but wise movements and clever passing, he can easily play until he is like 34yo.
I dunno what wages he will get, but he is at Chelsea for 4 years already so he should be able to also benefit from the tax rules, which means his 6m will be cost of like 4m (for club) for domestic player.
If thats the case then i realy dont have a problem with him coming here, its probably a wiser move than signing injury prone Pogba, even if im a fan of Paul.
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also, why i do think he can play till even mid thirthies? look at this:
This guy is a machine when it comes to injuries.