The England defender has been linked with Villarreal and told The News: "Harry (Redknapp) has been fantastic for me.
"He has bought well, he's got good players in playing relaxed. You see players like Jermain Defoe coming in and doing well. The club has really kicked on since I've been here.
"It's not only me - there are other players who have contributed and moved the club on as well. We've got good players coming in and helping out and that's what we need to get the club moving in the right direction.
"At whatever club I've been at, I've been ambitious and I want to push the club on - that's the way I've always been. It's in my nature."