The Tottenham Hotspur defender has given the striker his backing.
Indeed, the 22-year-old top scored at White Hart Lane last season but has only netted once in the league for the north London side so far this term.
But the Belgian is quoted as saying by the Standard: "All eyes are on him in our team. We are helping him to get the same or even more goals for this season as he did last time.
"Defenders are on him and he knows that. He is a smart guy, is a professional and works hard. The goals will come.
"I'm convinced he is going to be one of the best players in the Premier League one day and maybe the best. Harry is always there and will always score goals."
It's a huge vote of confidence for the striker who is currently short on Premier League goals.
The Tottenham forward's talent, of course, has never been in doubt. It's simply a combination of confidence, perhaps trying too hard and, as Vertonghen says, being man marked far more this season than the last.
The quicker Kane will get back scoring prolifically for Spurs the better, although a lot will depend on the creative forces in the north London side giving the 22-year-old chances that are too good to miss.
That places emphasis on the likes of of Christian Eriksen, Erik Lamela and Heung-Min Son (when he returns from fitness) as well as others.
Kane becoming the Premier League's best one day, though? Well, Gareth Bale achieved it while at Tottenham; why not their current favourite?