Craig Pawson had a semi-final to forget and he wasn't helped by either of his assistants on key incidents.
The first big call came when Alex Oxlade-Chamberlain tripped Sergio Aguero. Craig Pawson had a clear, unobstructed view but waved City appeals away.
Replays showed clear contact which although was minimal made Aguero stumble and lose his balance. It was a definite penalty.
Of course such decisions come down to opinion and Pawson obviously had doubts but there were none when City were denied a goal.