Ruben Amorim has challenged Amad Diallo to keep improving after the 22-year-old scored a dramatic 12-minute hat-trick to help Manchester United snatch a 3-1 victory over Premier League basement boys Southampton in a dramatic finish at Old Trafford.

Amad Diallo scored a dramatic hat-trick in the final 12 minutes as Manchester United came from behind to beat Southampton 3-1.

Ruben Amorim issued a note of caution after Amad Diallo scored a late hat-trick to rescue victory from the jaws of defeat for Manchester United against Southampton. After encouraging performances against Arsenal and Liverpool in recent weeks,