London - Another unconvincing display from Manchester United was compounded by a needless red card for Angel Di Maria on Monday as the Argentine added to manager Louis van Gaal's woes.
WATCH: Di Maria's moment of madness
With United trailing 2-1 to Arsenal in the FA Cup quarter-final, Di Maria was booked for diving and minutes later grabbed the shirt of referee Michael Oliver, giving the shocked official little choice but to send him off.