It may not prove to be his most financially-rewarding achievement of the season, but Cristiano Ronaldo could yet prise an extra note from Sir Alex Ferguson's wallet if he wins a personal wager with the Manchester United manager by scoring twice against Arsenal on Sunday to take his Premiership tally for the season to 15 goals.

Having made a 'two-bob' bet with Ronaldo last summer that he would not score 15 goals this season, though, it now seems almost certain that Ferguson will be handing over the cash before too long.