Mesut Ozil cost Arsenal £42.5m when they signed him from Real Madrid . Ozil has been in good form recently after a difficult first season . But Gilberto Silva says he needs to do more for the Gunners . Brazilian midfielder was part of Arsenal 's Invicible season in this season . And Gilberto believes the Gunners should be challenging for titles again . CLICK HERE for all the latest Arsenal news .
Mesut Ozil cost Arsenal £42.5m when they signed him from Real Madrid . Ozil has been in good form recently after a difficult first season . But Gilberto Silva says he needs to do more for the Gunners . Brazilian midfielder was part of Arsenal 's Invicible season in 2004 . And Gilberto believes the Gunners should be challenging for titles again . CLICK HERE for all the latest Arsenal news .