Manchester United won their fifth straight game under caretaker manager Ole Gunnar Solskjaer as they beat Reading in the FA Cup - but there was VAR confusion in the first half.

Fred's goal was ruled offside but United were awarded a penalty for a foul on Juan Mata in the build-up.

The Spaniard scored from the spot, before Romelu Lukaku doubled their lead just before half-time.

United now head to Dubai for training before facing Tottenham on 13 January.