Sanchez has 18 months left on his current contract at Arsenal .
Progress towards a new deal has been frustrating slow off the pitch whilst Sanchez has been proving Sanchez 's worth on a near - weekly basis in Arsene Wenger 's side .
Sanchez has 18 months left on his current contract at Arsenal but progress towards a new deal has been frustrating slow off the pitch whilst he has been proving his worth on a near - weekly basis in Arsene Wenger 's side .