Ole Gunnar Solskjaer was left frustrated that his team were denied a spot-kick at Stamford Bridge.
Luiz was sent off just before half-time for Arsenal but shouldn't have been, according to Clatts.
Clattenburg incredibly admitted to bias towards Man United, particularly in the Sir Alex Ferguson era.
Liverpool manager Jurgen Klopp insists he is no Sir Alex Ferguson and has not been playing mind games.
Mails on the confirmed Man Utd bias and we can leave Paddy alone now, poor guy's copped enough...
Clattenburg says the Liverpool manager is "clearly getting edgy" about United's Premier League form.
Mark Clattenburg left his role as a Premier League referee in February 2017.
Mark Clattenburg has revealed that he once changed his mind over a decision because of Roy Keane.
Jose Mourinho is to blame for ending Mark Clattenburg's 13-year reign as a Premier League referee.
Those comments about Tottenham? They were "taken out of context", says yer man Clatts.
Remember when Tottenham had a record nine players booked against Chelsea in 2016? Clatts does.
Departing referee reveals which idea from the Premier League he'd like to implement in Saudi Arabia...
Farewell, sweet prince. Mark Clattenburg is quitting the Premier League for a role in Saudi Arabia.
Referee Mark Clattenburg says that he would consider any offers from the Chinese Super League.
It seems the Chinese Super League like what they see from Premier League ref Mark Clattenburg.
On Moussa Dembele, Nacho Monreal, head injuries, Oxlade-Chamberlain and shooting from distance...
Jose Mourinho believes that Manchester United were denied two penalties against Manchester City.
English referee Mark Clattenburg will take charge of Sunday's Euro 2016 final. Fly the flag, Clatts.
Mark Clattenburg has been named as the referee for the FA Cup final.
Praise for Mauricio Pochettino, Danny Rose, Kyle Walker and Kevin Wimmer. Less praise for Mark Clattenburg
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