It's better to burn out, than to fade away.
Think I'd be more comfortable if we bought a proper CB for squad purposes, a few games from Sagan doesn't convince me he can do a job there full time. We'd need to get a right back in as well if that's the route Wenget wanted to go down.
Playing Sagna there is the cheap option
I can see sagna moving across to cb for good soon. He's lost some pace but can read the game and tackle. He would make a good cb IMO. I don't mind him being back up, vermealen is not to far away apparently so as 4 th choice back up, he's dine. But a another right back is a must if that's the route we take