The 31-year-old worked with Redknapp at Tottenham and has been linked with a reunion with the now Rs boss.
And, despite stating that there has been no contact with QPR just yet, the Hamburg midfielder lavished praise on his former manager.
“Harry Redknapp has not been in touch with me. He has not phoned me," Van der Vaart told BILD.
“In football you never know but so far we have not been in touch. Harry Redknapp and I enjoyed a really great relationship back at Tottenham. He is a top-quality manager.
“I was in great form back then. I scored 12 (Premier League) goals in one season and I netted 13 in the other season.”
In other QPR news, the club are reportedly upping the ante in their bid to sign midfielder Morgan Amalfitano.
According to the Daily Mail, Redknapp wants the Marseille midfielder to be just one of six new signings.
According to the news outlet, the Greek striker will move to Bordeaux, despite interest from Trabzonspor and Besiktas.
The reported fee would see Fulham take a hit on the £12 million they spent on Mitroglou.
Elsewhere, Fulham have signed Bulgarian international Nikolay Bodurov from Litex Lovech on a three-year deal.
The 28-year-old plays mainly as a centre-back but can also deputise on the right.
Finally, ex-Cottagers captain Brede Hangeland has been linked with a move to Crystal Palace, following recent reports that he could be on his way to Hull City.
Indeed, the Daily Mail report that the 33-year-old has agreed to join up with Tony Pulis after Palace missed out on the signing of Steven Caulker.