One manager has publicly claimed that his side have become worse since they sold their player to Arsenal. The Gunners’ recruitment has been incredible over the last few years. Gone are the days when Arsenal would have to settle for players that the massive clubs didn’t want. We are now up there with the best teams in the world, and almost everyone would love to join us. Mikel Arteta deserves enormous praise for the job he has done at Arsenal. Without him, we would not be where we are today. Now, one thing the Spaniard did in last summer’s transfer window has really hurt another club’s manager,…