Thomas Vermaelen
The Captain of Arsenal was more of a reserve player. The Belgian endured a difficult season in the club as he lost his position to the more consistent centre back Laurent Koscielny. Vermaelen lost his place more because of his error prone defending as well as his tendency to pick up niggling injuries that de-stabilize the back four time and again because of his coming in and out of the team.
Thomas Vermaelen is still among the fray of top defenders and could fetch a decent price if sold to a club that actually need him more on a regular basis and would also not have as lofty aspirations as Arsenal in the coming season. Vermaelen would possibly look for a move to some other league, which could possibly suit his injury prone nature that the physically demanding Premier League rejects.