Here is Tuesday's NBA Christmas Day slate: Milwaukee Bucks at New York Knicks Oklahoma City Thunder at Houston Rockets Philadelphia 76ers at Boston Celtics Los Angeles Lakers at Golden State Warriors Portland Trail Blazers at Utah Jazz Let's take a look at the 10 things to look for on NBA Christmas with a hand from our colleagues at Opta. If you like what you see here, give 'em a follow at @OptaLarry (as in Bird). First game between Sixers and Celtics On the first day of Christmas, my true love gave to me … the first meeting for the Sixers and C's.