Louis van Gaal admits Manchester United copied a free-kick routine from Europa League opponents FC Midtjylland to beat Shrewsbury.
United eased past League One Shrewsbury in the FA Cup fifth round, beating them 3-0 to set a quarter-final date with West Ham.
Chris Smalling and Jesse Lingard scored the first and last goals at Greenhous Meadow, with Juan Mata’s free-kick the highlight of the evening.
The Spaniard strike in first-half stoppage time was the subject of controversy as three United players were stood behind the Shrewsbury wall, all in an offside position, when the free-kick was struck.
But Van Gaal revealed that his side copied the routine from their Europa League opponents, FC Midtjylland, who beat them 2-1 in the first leg of their last-32 tie last Thursday.
“We have learnt because we have analysed Midjytlland,” Van Gaal told BT Sport. “And we have seen that they are doing that and we think it is always offside.
“We have asked the referees, at the time the Portuguese referees, and they are saying no, there’s no offside you can do that.
“That’s why we have learned off Midjytlland the taking of the free-kicks and today we scored, and that’s good I think.
The Dutchman added: “Everybody shall say it is against Shrewsbury Town and Manchester United has to win but we have seen very difficult results in the FA Cup, not always the top team is winning. So I think we have done it fantastically.”