Amorim would like United to build up with a genuine three at the back, rather than the four it has been when protection is the first priority. At Anfield, United took the lead because Martinez sensed a moment to press high, snapping into Mohamed Salah to win the ball and then stay up to receive Fernandes’ slipped pass.

At the end of their two-hour slugfest with Arsenal, Man United had a full back at centre back, a midfielder at wing back and a centre back up front.

Manchester United boss Ruben Amorim says his team needs time to "build a different way of playing". Since Amorim's arrival in November, the Red Devils have impressed most in away games against big sides - drawing at Anfield and winning 2-1 at Etihad Stadium in the Premier League before beating Arsenal on penalties in the FA Cup.