It’s mid-January in the NBA, which means everyone is either hurt, miserable or both. The Celtics  had 10 players dressed and half of them were in some kind of foul trouble at various points in the game.
This was not a night for aesthetically-pleasing basketball, but the Celtics made the plays they needed to make in the fourth quarter and came away with a 99-94 victory over the Charlotte Bobcats .
Here’s how they did it:
WHAT WENT RIGHT
Shaquille O’Neal  had his most important game of the season: Without Kevin Garnett  and Jermaine O’Neal , the Celtics were down to Shaq and Semih Erden at center and Glen Davis  and Luke Harangody as big forwards.
Shaq played 17 minutes in the first half, mainly because Doc Rivers  had no other options and he logged a season-high 35 to go with 23 points and five rebounds. Considering everything that has happened to the Celtics this week in terms of injuries, this was a big-time performance and arguably his best of the season.
Rajon Rondo  had the world on a string: There are times when Rondo can be spectacular, and other times when he is spectacularly precise. This game was the latter. Rondo read screens, angles and pick and rolls and dissected the Bobacats with precise passes and smart decisions.
Sometimes Rondo’s stats can be deceiving. His huge assist nights are usually tied to hot shooting nights on the perimeter. Not this night. He had 18 points, 13 assists and six rebounds and earned every one of them.
Paul Pierce  and Ray Allen , like clockwork: Paul Pierce and Ray Allen shot a combined 12-for-20 from the floor, including 7-for-12 from 3-point range. For good measure they also made seven of eight free throws and each scored 19 points.
WHAT WENT WRONG
Foul trouble: The Celtics had 10 players available Friday night because of injuries and Avery Bradley’s assignment to the D-League. The one thing they could not afford was to have any kind of foul trouble, especially up front. Oh well. Erden picked up three fouls in three minutes in the second quarter, which meant Shaquille O’Neal had to play 17 first-half minutes.
Pierce picked up his fourth midway through the third quarter and left with 17 points on 7-for-12 shooting and the Celtics up by six. The Bobcats closed the gap with Pierce out of the game, but the Celtics pulled away early in the fourth quarter allowing Pierce to sit until the 4-minute mark of the fourth quarter.
Offensive rebounding: You could see this one coming a mile away. Without Garnett or Jermaine O’Neal, the Celtics frontline is exposed when it comes to rebounding. The Bobcats racked up 13 offensive boards and controlled the glass.
Free throws: The Celtics got to the free throw line only 25 times and most of those came late in the game when the Bobcats were trying to put them there. This isn’t that surprising since they are one of the worst teams in the league at getting to the line. It’s generally a given that their opponent will have more free throws than they will, but the Bobcats shot nine more than the Celtics, and were +8 at the line, which kept them in the game.