Casemiro finds substitute Facundo Pellistri, who jinks inside from the right and feeds Marcus Rashford to finish, putting the result beyond doubt and ensuring the Reds go through to the semi-finals of the Carabao Cup.
That was the highlight of Pellistri’s first competitive appearance for United's senior side.
The young Uruguay international was a bright spark after he was introduced 84 minutes into the match, showing good skill and lighting pace as he caused problems for a weary Charlton defence.
His assist was no more than he deserved, and after the match he expressed his delight at making an impact.