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Both firms told MCV they make Call of Duty: Black Ops 2 the favourite, ahead of FIFA 13 and the likes of New Super Mario Bros U, Medal of Honor: Warfighter, Assassin's Creed 3 and Halo 4.

Alex Donohue of Ladbrokes said: "It would be one of the upsets of the year if Black Ops didn't land the top spot this Christmas."

The Elder Scrolls V: Skyrim claimed the Christmas No.1 spot last year, marking the first time in eight years the Xmas top spot didn't go to an EA or Activision game.

Paddy Power odds:

• 1/20 - Call Of Duty: Black Ops II
• 8/1 - FIFA 13
• 20/1 - Medal of Honour: Warfighter
• 28/1 - Borderlands 2
• 33/1 - World Of Warcraft: Mists Of Pandaria
• 33/1 - Assassin's Creed III
• 33/1 - New Super Mario Bros. U

Ladbrokes odds:

• 1/8 - Call of Duty: Black Ops II
• 12/1 - New Super Mario Bros U
• 14/1 - Halo 4
• 16/1 - Assasin Creed III
• 16/1 - FIFA 13
• 25/1 - LEGO Lord of the Rings
• 25/1 - Hitman Absolution
• 33/1 - Medal of Honor: Warfighter
• 33/1 - WWE '13
• 50/1 - Just Dance 4
• 50/1 - Football Manager 2013
• 50/1 - Need for Speed Most Wanted
• 66/1 - Far Cry 3
• 100/1 - Madden NFL 13
• 100/1 - Forza Horizon
• 100/1 - Diablo 3
• 100/1 - Resident Evil 6
• 100/1 - Dishonored