“He’s done great for me, but I think there’s improvement in him. I do think he’s got some improvements to make to be a top player.

“I think we’re a good platform for him to do that in the Premier League. I have tried to say to him I want him to be a massive success here.

“If Spurs blew us out of the water or Man City offered £50 million and it was Champions League football, okay, it’s because you’re the finished product.

“This is what Wilf’s ambition should be, but he needs to address his goals and assists.

“If a club came in with, say, £50-£60 million – let’s say a Manchester City, Barcelona or Real Madrid, and he’s got 10 goals and nine assists – as his manager at Crystal Palace I can’t really stand in his way.