The main reason for Boston Celtics victory in handicap is situation at Washington Wizards. As You probably know, the bizarre incident happened some time ago in their locker room. Wizards best player Gilbert Arenas is suspended after he took out a gun in the locker room. Some sources are talking about gun possession, but other sources said Arenas point the gun to some of his team mates. Later we find out that another player was involved - Javaris Crittenton. He is also suspended now and Washington will not be strong as earlier. So, suspension of two players for an unspecified time will be a huge handicap for the team from the capital of the United States. Because of that I expect a victory for Boston.
But thats not all. Washington current form isn't something special. They lost four out of last six games. Here are the results:

31/01/2010 Washington - New York Knicks 106:96
30/01/2010. New Jersey Nets - Washington 79:81
27/01/2010. Washington - L.A. Lakers 103:115
24/01/2010. Washington - L.A. Clippers 78:92
23/01/2010. Washington - Miami Heat 88:112
21/01/2010. Washington - Dallas Mavericks 93:94

I think Boston Celtic is favorite here.Boston won last two mutual games. Here are the results:

11/12/2009. Washington - Boston 102:104

12/12/2008. Washington - Boston 88:122

Once again, I beleive in Boston victory. Handicap is always tricky, but I think it isn't too big for Boston.