Richard Keys was left shocked after Manchester United's equaliser in their 2-1 win against Manchester City was allowed to stand.
United were trailing to a Jack Grealish goal at Old Trafford but managed to pull level through Bruno Fernandes in the 78th minute before Marcus Rashford got the winner four minutes later.
However, United's equaliser was shrouded in controversy amidst claims that Rashford, who was offside, was interfering with play in the build-up to Fernandes' goal.
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