There is also some heightened concern in the USA camp about a couple of close calls within the past week vs. an unfancied South Sudan, then Germany, both decided in the final moments. Defensive shortcomings have rung some alarm bells; allowing 100 and then 88 points in 40 minutes in back-to-back games might be reason for concern. True, Kerr’s stated goal of ball-movement and three-point shots (especially with the arc nearly 2 feet shorter than in the NBA) , and a loaded American roster, seems a winning formula, but the dynamics change if the triples aren’t falling. It took some late LeBron heroics to save the USA in recent games, though that’s not by design from Kerr, who also knows that cobbling together a team of NBA All-Stars in quick order is not as easy as it seems, especially with several players forced into lesser and different roles than they normally might. Kevin Durant has also yet to participate this summer due to a calf strain (a worse injury than it sounds) and is doubtful for Sunday. Meanwhile, keep in mind the Serbs were shorthanded for their recent 105-79 loss to the Yanks in Abu Dhabi, without Bogdan Bogdanovic, who is now ready to go, and the Joker was using the practice schedule to ramp up for real competitions. Veterans of many FIBA wars, Serbia is likely to put on a better show than the exhibition game two weeks ago. Play Serbia