Matija Nastasic an Upgrade on Vermaelen?

Wenger's plans to bring new life into the team, with Matija Nastasic being eyed up as a replacement for Thomas Vermaelen. As the possible arrival of Mangala to Man City it looks like the Serbian is on his way out. Being targeted by many teams like Roma, Inter and Arsenal it will be a  battle for the signing of Nastasic. Being injured for a good portion of the season it looks like a gamble, but looking on the good side he still is very young which means he'll improve from here on out.