The Lakers are going to have to get on the same page when it comes to defending the Boston Celtics in the post.  There were a few situations in the second half where the Lakers tried to front the post, however the lack of ball pressure lead to easy baskets for the Celtics:

In both of these videos, the individual parts of the defense aren’t the problem.  Kobe makes the correct decision in playing off of Rajon Rondo to prevent him from penetrating and the fronting of the post in itself is a decent strategy.  However, you can’t do both at the same time.  This is because if you front the post, you are basically daring the offense to throw a pass over the defenders head.  Give a guy like Rajon Rondo 10 feet, and he is going to make that pass 9 out of 10 times.

In the end this is all about communication.  If the Lakers get caught in front of the the Boston’s big men, they have to let Kobe know (because he can’t see it as he is focused on the ball and his man) so he can put pressure on the basketball.  I think being in front of their home crowd, the Lakers are going to be able to communicate easier and you won’t see mistakes like these.