Joe believes Kane is among the best strikers in Europe but urged the striker to focus on improving Tottenham rather than considering a move away.
“I said yesterday that [Robert] Lewandowski is unbelievable and that he’d be the best no.9 in England.” Jol told TalkSPORT.
“And I think Kane is the same, and may be a little more versatile than Lewandowski.
“To influence him a bit I would say the grass is not greener on the other side.
“I think Harry Kane is on a very good contract, and he is a Spurs boy.
“But the only thing is they are not winning anything.”
He said: “Harry Kane is probably thinking about it and having those questions. They need answering soon. He’s 26 and you only have a small window of opportunity, they come and go very quickly.”