"Of course, I welcome the signing. We just needed a few small details, a few new players in order to make a big difference to our season," said the Dutch international.
"Hopefully Robbie can do very well for us. He has shown, particularly last year but also the years before that, that he is a quality player. He is one of the better players in the Premier League, and that's what we need.
"Hopefully he can do for us what he did for Spurs."