Amad Diallo became the first Manchester United player to score a Premier League hat-trick since Cristiano Ronaldo almost three years ago. United's modern-day talisman didn't net the first of his late flurry until the dramatic contest with Southampton had ticked into the 82nd minute.

For a good 80 minutes or so, Manchester United were facing the potential ignominy of a fourth consecutive home defeat. The first television sets had only been on sale a few years the last time that happened at Old Trafford.