Jose Mourinho believes Man Utd star Robin van Persie should have faced retrospective action for elbow on James Tomkins

Jose Mourinho has lashed out again at the Football Association and Sky Sports, accusing them of operating with double standards in pursuit of violent conduct charges against players.

Mourinho demanded to know why the rules which applied to Diego Costa did not apply to other players in the Barclays Premier League.

He did not mention Robin van Persie but he was talking about the Manchester United striker, who escaped a violent conduct charge after he appeared to throw an elbow into James Tomkins' face during a 1-1 draw at West Ham on Sunday.

the Chelsea boss mimed an elbow and said: 'A player did this in the face of somebody else and nothing happened. The same thing happened last season when Ramires was suspended and one week later a Man City player kicked a player at Norwich, who was on the floor and nothing happened. I'm used to it.'

Ramires was banned for four games last April when cameras caught an off-the-ball elbow on Seb Larsson. It was missed at the time but treated as his second red card of the season.