Referee's fault, or Herrera's? FA Cup red card splits Manchester United fans

The Spain midfielder was sent off before half-time for two soft fouls, diving opinion amongst those watching the action in the quarter final

Ander Herrera's first-half red card put Manchester United on the back foot as they sought to continue their FA Cup defence with victory over Chelsea

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And the decision was so tough that not even the Red Devils themselves could come to an agreement. 

Some fans took to Twitter to slam Michael Oliver for pulling out two bookings for the Spain international in the space of just 15 minutes. 

Others chose to single out the midfielder for what were a pair of rather unnecessary fouls - but who is on the money?