Preseason NBA games go something like this: Hey, basketball’s back! Then the second quarter starts and you’re reminded that it’s preseason. By the time the second half tips off, everyone’s trying to not get hurt, while rookies and free agents are looking for that one shot of glory.
The Celtics  will play Fenerbache Ulker on Friday afternoon in Istanbul, and while there’s only so much that can be determined in the first exhibition, there are still a number of things worth keeping an eye on as they begin to take shape for the upcoming season.
Here are five areas to watch:
THE NEW-LOOK BACKCOURT: It will be jarring to see the Celtics lineup without Ray Allen  in his customary spot, but more than appearances, the C’s guards will have an entirely different feel. Courtney Lee  is likely to start with Jason Terry  operating as a sixth man. Lee won’t get nearly as many touches as Allen did, and it will be interesting to see how Doc Rivers  adjusts the offense without Allen running off so many picks.
One of the benefits of Avery Bradley ‘s emergence last season was that it allowed Rivers to take Rajon Rondo  off the ball defensively. That has tremendous value, not only because Bradley is such a good defender, but it also allowed Rondo the chance to conserve energy on the defensive end. Lee brings a tough defensive-mindset to the position, but can he handle the fullcourt pressure defense that Rivers prefers?
HOW WILL JEFF GREEN  BE UTILIZED? This is the key question, maybe for the whole season. Green has not fared well defensively as a big forward, but if Kevin Garnett  is lined up next to him that could alter the dynamic considerably. Another big question that Rivers hinted at already: Can Green and Paul Pierce  function together as a forward tandem?
One of the biggest reasons that Green was not an overnight success in Boston is that he was never able to fill a consistent role. Part of that is on him for not being assertive enough and part of that is on Rivers to create one.
IS JARED SULLINGER READY? It’s been a tough camp for Chris Wilcox , who is dealing with back spasms in addition to trying to return from heart surgery. Wilcox is the only veteran backup 4 on the roster, and if he can’t go on Friday, that would seem to give the Ohio State rookie an early opportunity to make an impression.
SPEAKING OF ROOKIES: Dionte Christmas, Kris Joseph and Jamar Smith are part of a battle for what could be two open roster spots. Christmas received a higher guarantee than the others, so he would appear to have a leg up heading into the camp. That can all change quickly, however.
Need is a relative term for a squad with championship aspirations and veterans at nearly every position, but the two that stand out are backup point guard (Smith) and depth on the wing (Christmas and Joseph).
ALL THAT AND DARKO TOO: The over/under on how long it takes Tommy Heinsohn to compare Darko to Bill Russell  has been set at eight minutes. Tommy’s not in Istanbul, but has there even been this much intrigue for a backup center?
Heinsohn aside, for one of the first times in his career the expectations for Darko are actually reasonable and manageable. If he can give the C’s 15-20 minutes a night as a backup center, they will be thrilled. Rebounding has been a major point of emphasis for Rivers during camp, and that’s where the Celtics really need Darko to make a difference.