Chelsea have a buy-back clause to bring the Dutchman to Stamford Bridge.
Regardless, Robson thinks Arsenal should challenge their rivals to sign the talented defender.
"There's talk about him going back to Chelsea because they can buy him for a certain price but he's a very good centre-half.
"He's not the biggest but he's got good spring and I think he's the type of player [Mikel] Arteta will like.
"He would be my choice coming in from Bournemouth."