Unsurprisingly, a number of top clubs have expressed their interest in signing van Dijk recently and now Ajax icon De Boer has taken the time out to praise the 25-year-old by hailing him as 'one of the best defenders' in the Premier League, following a so-so beginning to his career with FC Groningen.
De Boer told talkSPORT: "He has made a transition in a positive way.
"When he was at Groningen he did OK, he was physical, but we Dutch men always want defenders to play the ball to the same colour and that is something we thought was not his best thing. But now he does that.
"His passing is excellent but, most importantly, his defending is outstanding. He is showing it week in, week out in one of the toughest leagues in the world."