I thought both the SA reds were rubbish. As Brontebilly says the first one was a classic hooking the leg around the defender to look like a foul. The second was the old clutching the face like you've been hit by Mike Tyson ruse. The Mexican red was a cynical challenge and the SA attacker would have been through on goal.
Portugal will have been watching that and thinking if that's standard then there will be easy pickings. I can't imagine any team playing them and end up with more than half a dozen players still on the pitch.
Worst of all, our feed in Australia had Andy Hinchliffe as co-commentator. He is awful.