Can't absolve Sergio of responsibility, it was reckless and could have cost us 2 points at least and, having watched it retrospectively, Mariner may feel as though he misjudged the situation. But Mariner is an experienced, reasonably well paid, full time professional referee and making accurate and fair decisions on real time incidents during a game is one of his prime job requirements and, as such, I cannot believe he did not see that incident. It wasn't off the ball and he had a clear, unobstructed view, the fact that he, the FA, the media and whoever else think he made the wrong call at the time doesn't give the FA the right, under the current rules to reappraise it.