Who plays at left back?

Much like the right back position, we struggled last week at left back.

We saw in the trials what SIN (19) can do, with his pace and defensive abilities causing havoc down the left. But on Saturday he struggled to link with the left winger and left huge gaps. Do we need to give him more time to settle into the system? MHEE (5) can play on the left and showed glimpses during pre-season of his quality. M (3) showed in pre-season that he’s very comfortable in the left back position and seems to have the confidence of the coaches in that role. Could his experience be a huge benefit to us against a young Egy Thai side?