The supporters’ ovation for our precociously gifted teenager was a massive one and his entrance provided an obvious boost to the noise levels, as well as the team’s attacking momentum on the pitch.
West Ham were 1-0 up after scoring a first-half goal against the run of play via Manuel Lanzini and, at the time of Greenwood’s introduction, United had registered 16 shots at goal to the Hammers’ four.
The much-changed Reds were controlling the game and working hard to find a breakthrough against a stubborn Hammers defence, seemingly intent on holding onto their slender advantage.
A lethal finisher was required and Ole Gunnar Solskjaer called for his young apprentice, Mason, who has impressed so many already this season – not only by scoring three Premier League goals in August, but also with his mature and more rounded performances around the pitch.