Steve Kerr wonders whether Serbia and Nikola Jokic might have played a long game with the Americans and are ready to unveil some surprises when they meet for a third time in less than a month in Thursday’s high-stakes semifinals (3 p.m. ET). “We can’t get lulled to sleep because we beat them twice,” Kerr said. “We have to be prepared for their best effort. We’ve got to think about what are they going to do differently. Jokic, I guess he could play 40 minutes. What else do they have up their sleeve?”