The Manchester rivals were sensationally drawn together to meet in the third round with United the 13/8 underdogs to dump City out of the Cup.
Cup holders City share trophy favouritism with Chelsea. United are now only fifth favourites to win the Cup (9/1) behind Arsenal (7/1) and Spurs (8/1).
David Williams of Ladbrokes told betrescue.com: “It’s a horror draw for United and despite City having a tough fixture we”re still keen to keep them as joint favourites.”
Who will qualify for the next round?
FA Cup winner
11/2 Man City
9/1 Man United