Former Arsenal star Gilberto Silva has issued a challenge to record signing Mesut Özil, and says the German has to improve in order to succeed at Arsenal, as reported by the Mirror. READ MORE: Arsenal transfer rumours Arsenal Predicted Lineup Vs Queens Park Rangers With Danny Welbeck Set To Return Worrying Stat Proves Arsenal Duo Ozil And Sanchez Are Incompatible The Invincible Gunner couldn't deny the German's quality, but believes he needs to do more in an Arsenal shirt to convince him. Silva claims Özil could prove vital to the success of the club, but says he needs to quicken the pace of his game. 'You speak about Arsenal and how they don't spend big money on a player often but...
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