Who starts at left-back?

Is this the toughest vote so far? Young full-back Katang (3) started pre-season in scintillating form and quickly became one of the first names on the team-sheet, infact the holders even nicknamed him Marcelo, after the legendary Brazilian! However he had to take an extended break from the team and in his absence surprise package Pang (12) came in as understudy and arguably has been our best performer! With both available for selection which do you want to be your left back?