Pregame: Doc's keys; Shaq's out

MIAMI -- Celtics coach Doc Rivers said the key to his team's success in Tuesday's Game 2 of its Eastern Conference semifinal series against the Miami Heat is quite simple.

"It would be nice to at least run our game plan, that way we would know if what we were doing is right or wrong," said Rivers, who noted after Sunday's Game 1 loss that Boston abandoned its offensive game plan, contributing to their struggles.

"We've got to run them off 3[-pointers] obviously, we can't turn the ball over, and then we've just got to move the ball offensively. Those would be the three things. Everything else, we're pretty happy with. Dwyane [Wade] and LeBron [James] are capable of having big games, we knew that going in. They are capable of having it tonight too, but you can still win games when that happens."

A couple of other notes from pregame:

* As expected, Celtics center Shaquille O'Neal is out for Tuesday's game because of lingering soreness after going through a full practice on Monday. Rivers said at this morning's shootaround that O'Neal, limited to 5½ minutes of game action since Feb. 1, was unlikely to play and would instead eye Saturday's Game 3. The Heat will remain without Udonis Haslem and neither team changed its active roster.

* Tonight's referees: Joey Crawford, Jason Phillips, and Greg Willard ... Here's a glimpse of the free shirts waiting for fans at American Airlines Arena.