By Tom Gott Aston Villa have agreed a deal to sell record signing Moussa Diaby to Saudi Arabia just 12 months after his arrival at the club. Diaby was tempted by a move to Saudi side Al Nassr last summer but ultimately opted to join Villa in a deal worth over £50m, after which he struggled to showcase his best form on a consistent basis. 90min confirmed last week that Diaby had once again received an approach from Saudi Arabia, this time from Al Ittihad, and had expressed an interest in heading to the Middle East 12 months after rejecting a switch. While Villa were reluctant to agree to a sale…