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Sir Alex Ferguson has backed his Manchester United stars to behave in Tuesday's showdown clash with Arsenal at Highbury.
A heated affair is expected in North London, which is live on Sky Sports 1, following a fierce clash between the sides at Old Trafford.
Arsenal's 2-0 loss to The Red Devils back in October ended their unbeaten run in The Premiership, while Ruud van Nistelrooy was banned for three games for a tackle on Ashley Cole.