The last city of transfer window, Arsenal scouted Mesut Özil from Real Madrid. After scouted Özil, Arsenal gained the lead in English Premier League table.
Meanwhile, Arsenal lost 1-3 by Borussia Dortmund in 3rd match of 2013-14 UEFA Champions League Group Stage that held at Emirates Stadium(home stadium of Arsenal) in 22 October 2013. As a result, Arsenal's uptrend was stopped.
And Arsenal showed a weakness that Arsenal never showed. If Özil was blocked by Dortmund's defenders then Arsenal never showed fast-moving attack.
Özil takes a role of playmaker not current team Arsenal but ex team Real Madrid. So Özil's team lost game that Özil was blocked by relative defense.
The representative game is 'El Clasico' derby match when the match held at Comp Nou(home stadium of FC Barcelona) in 30 November 2010. The match, Özil did not offer pass by team members because of Barcelona's strong pressure. And as soon as began second half, Özil was replaced. So Özil's team Real Madrid lost 0-5 by FC Barcelona.
Further, Özil's team lost semi final game1 of 2012-13 UEFA Champions League because relative defense blocked pass to Özil'. This match, Dortmund's manager Jurgen Klopp used Gegen pressing tactic that Dortmund's offender block pass from Real Madrid's defenders to Özil.
This Gegen pressing tactic obtained effect. Özil's team Real Madrid lost 1-4 by Borussia Dortmund. Because of this match, Real Madrid failed to qualify for the finals of 2012-13 UEFA Champions League.
After 6 months, Özil transferred from Real Madrid to Arsenal. Özil played with Borussia Dortmund that Jurgen Klopp is still manager of Borussia Dortmund. And Özil's team lost again.
Taken together, There was bad case that Özil's team lost game when Özil was blocked by relative defence. Not Arsenal but Real Madrid lost game.
And Arsenal vs Borussia Dortmund game watched all team. So, as opposing team seek a solution. If so, Arsenal's manager Arsene Wenger's choice is just one.
The choice is that Arsene Wenger must make Plan B. Plan B is that if Özil is blocked by relative defence then other Arsenal's players takes a role of playmaker like Özil.
If Arsene Wenger didn't make Plan B, Arsenal will not be Champion.