I know many of us think in terms of one lone striker playing up front now but thats largely because of the lack of versatility in players these days. However, when we are talking about this level of football all the best players have the ability to perform in a range of different positions, and Costa is certainly no exception to this. Certainly Costa usually plays as a centre forward and would be ideally suited to performing that role for Arsenal. However, he also has the skills and ability to play as attacking midfield which obviously opens up all kinds of options for Wenger. First of all, theres the ability to play behind Giroud but there is also the option of switching positions with Ozil which would certainly be hell for opposition defenders to deal with. The Brazilian would open up a number of very interesting options that could well prove to make the Gunners into an unstoppable force. Clearly, there are a number of very good attacking teams in the EPL but this is one signing that would be a demonstration of Arsenals intent to win the league.