His role was somewhere between a right sided libero, defensive midfielder, and right - back, and his position wasn't far off that which a right - back would take up in a narrow back four, but he was asked to do more when his side had the ball.
I won't go into the whole Schweinsteiger situation as my main concern was with the right side of the backline (although Sean's piece on Basti's transition to libero is worth another look).