Rafael van der Vaart has urged Hamburg teammate Heung-Min Son to stay next season.

Son's agent has revealed the interest of Manchester United, Chelsea and Inter Milan in recent days.

"I think it would be better for Sonny to stay here. And I say this not only because I wish it, but because the boy is phenomenal for us. He's had a first good season of his career, he does not have to be nervous and go," said former Tottenham star Van der Vaart.