I'm absolutely disgusted at the disallowed goal in the first half. I'd have celebrated it if it let us off the hook in a random game, but I'd have thought the same thing - football is a contact sport, McTomminay is entitled to shrug off his opponent, Son tries to grab McTomminay, McTomminay shrugs him off, he's ahead of Son so can't see where his hand is going to flick him.
To make matters worse, the ref doesn't give the foul, then on the monitor he overturns the decision as a clear and obvious error. Absolute shambles and could have cost us the game.