After those three teams were decided, they were drawn into the groups alongside the nine other qualifiers for the first stage of the tournament. The United States already knew that it would face the champions of the Oceania, Americas, and Asia tournaments in Australia, Venezuela, and China. Of the three qualifiers, France and Serbia were added to Group A to complete the picture. Croatia was then drawn into Group B along with African champions Nigeria, European champions Spain, Brazil, and both teams that qualified as runners up at the federation level, Lithuania and Argentina. The first stage will be a round robin tournament within each group with the top four teams qualifying for the knockout round. The quarterfinals will match teams from opposite groups as it will be single elimination to determine the medal winners.
With the long NBA seasons of recent years, USA Basketball opted for a slightly different approach to preparations. Instead of calling all individual players into tryouts before the tournament, members of the pool were questioned about their availability and the final list of twelve players was announced before training camp. While many veterans had to rule themselves out of contention after their professional seasons, Carmelo Anthony and Kevin Durant returned with the expectation of filling leadership roles. Many of the remaining spots were filled by players who had shown their value two years ago as Kyrie Irving, Klay Thompson, DeMarcus Cousins, and DeMar DeRozan were also added. Paul George had been expected to be a key player in that tournament before his injury and he was finally able to return to claim a roster spot. Players who had participated in recent national team practices also stepped up to claim spots as Jimmy Butler, Harrison Barnes, Draymond Green, and DeAndre Jordan joined the fray. Injuries at the point guard position forced the committee to look into a wider range of options, choosing to bring Kyle Lowry on board.
The team then started training in earnest, enlisting the help of a young Select squad of up and coming players to prepare them for the tournament as a camp was held in Las Vegas. Without the need to cut players, training was fairly brief and no intra-squad game was played before the first exhibition game. That game was against Argentina in Las Vegas as an easy win helped players get acclimated to the international game again. That continued with four more games, strategically picking cities and opponents to showcase certain players and to allow fans around the country to get a glimpse of the team. Wins against China in Los Angeles and Oakland were followed a homecoming for the coach in a win over Venezuela and a win over Nigeria in Houston.
The team then got ready to travel to Brazil, the culmination of a long effort that started after the 2004 Olympics to restore American dominance at the international level. Team pride and respect for opponents were brought back into the picture after a series of difficult losses and after a hiccup in the first tournament, winning ways were resumed. The team is favored to win a third straight Olympic Gold Medal, possibly marking the end of an era as many of the people involved will be in their current roles for the last time.