I think three pointers will be the key to this series.
In most of Boston's wins this postseason, they have shared the ball well, and gotten eachother a lot of great looks from three.
However, in their losses, it has been a lot of isomotion, relying on one player to carry the team.
Likewise, LA is not a great three point shooting team, so a key for them would be hitting the three ball to open up the Celts defense for guys like Kobe and Pau.
It will be interesting to see how it plays out.