I am sure that Eduardo dove for his penalty (and that was wrong of him. Bad Eduardo!) but I disagree that that was the turning point in the match. For it to be called a turning point the match needed to, well … turn. But from what I saw Arsenal had a pretty tight hold on the match all the way from beginning to end. Yeah sure it feels a bit dirty that he took a dive but it did not change what Celtic had to do to win the game at that point: score 3 goals. The fact that they never threatened to do that (and that we scored twice afterwards) makes the point moot.