3) Joel Campbell
The Costa Rican international was expected to have a massive breakthrough season this year, but eventually ended up being loaned out to Villarreal in January as part of the Gabriel Paulista deal.
Campbell was superb for Olympiakos during the 2013/2014 campaign, scoring a wonder-goal against Manchester United in the Champions League, and then continued his form over the World Cup in Brazil for Costa Rica.
The mood around Arsenal was one of excitement for Campbell and after scoring in the Emirates Cup, they were ready to see his breakthrough campaign.
However, after a dismal performance against Southampton in the Capital One Cup, the winger wasn’t given another chance and was then loaned out to Villarreal.
With an abundance of options down the wing at Arsenal, for his own sake, Campbell needs a move away from the club
