I'm not surprised by his decision truthfully. He has already been on the radar of some big clubs like Real Madrid. As Real Madrid seem to be performing bigger than Chelsea lately, this would be a big factor for Antonio Rudiger to make his decision clearly. Maybe we could see him in his home country too if he gets an offer from Bayern Munich for example. But rather than there, I'd like to see him staying or joining Real Madrid. Because Real Madrid are aiming to build a very solid lineup for the coming season and they are thinking the far future also.