Recent games have been marred by sendings off .
The fixture has seen 21 red cards in the Premier League , the highest tally for any fixture ( though the 20th of these was subsequently rescinded by the FA ) .
Recent games have been marred by sendings off , and the fixture has seen 21 red cards in the Premier League , the highest tally for any fixture ( though the 20th of these was subsequently rescinded by the FA ) .