Doc said (postgame) he thought about putting Tony Allen in for Ray to cover Kobe on the Lakers' last possession, but decided it was best to "have a star guarding a star". Neither choice was best, and the Lakers showed why:
There isn't any one player in the league who can stop Kobe from getting a shot off in that situation. The best you can do is make the shot as difficult as possible, and Ray did just that. He was all over Kobe, but Kobe still got the shot off and made it.
Now, the Celts have one last chance and the Lakers are determined to not let Paul Pierce take the last shot, nor KG. They were willing to gamble on Ray because he's been off lately and has played a lot of minutes (over 40 in half the games this past month). So when the ball goes to Pierce he is immediately doubled-teamed (by Ray's man) and has to give up the ball. The Lakers have a man in the passing lane between Pierce and KG, so Paul does the right thing and loops the ball over to wide-open Ray, who fails to knock it down. Game over.
So the Lakers get the guy they want to take their last shot, and he makes it. And they force the Celts to have their third option take the last shot, and he misses. They played the percentages better than we did.
Now, my question is: why wasn't Kobe double-teamed and forced to give up the ball? Who else has been knocking down game winners for the Lakers lately?