Referee had an absolute shocker tonight. Not having that Shelvey was a red card and definitely not a pen as Lansbury did just as much as he did. Newcastle should have had 2 pens, seemed to have had a good goal disallowed and the second red card and penalty was another shocker. Definitely debatable whether it's a pen but 100% not a red card. Newcastle can feel very hard done by imo.
The moment Shelvey kicks out he is risking a red card. From the Assistants view (he made the call), it will look bad and Lansbury made sure it looked worse than it was.
Ref's bottled it there, Luiz should be off.
I do feel that Aguero went down far too easily. He should have been much stronger, but having said that maybe it was a foul. The replay is very telling. The referee clearly was not too sure as he looked over at his assistant, which he shouldn't have needed to do. It was his decision to make.