Just curious if anyone knows who on the Raptors is commanding the defence? I find it difficult to tell from the tv broadcasts, but was wondering which players primarily fill the Tyson Chandler/Tim Duncan role and is doing most of the talking/communicating while on defence. It seems like an important role, but I have no idea which guys on this roster fill it. My gut tells me it should be a big because they generally have the best view of all, but I'm doubting Valanciunas is there yet. Is Amir defence-minded enough to the point where he's barking instructions at his teammates? What about players off the bench?