Capsule previews for the basketball World Cup

              FILE - In this Aug. 16, 2019, file photo, United States' Kemba Walker is shown during the second half of an exhibition basketball game against Spain in Anaheim, Calif. The Boston Celtics will have at least three and possibly four players on the final 12-man roster that USA Basketball will take to China next week for the FIBA World Cup. So these Team USA practices have been a get-to-know-you bonus of sorts for new Celtics guard Kemba Walker and Boston teammates Jayson Tatum, Jaylen Brown and Marcus Smart. (AP Photo/Marcio Jose Sanchez, File)

SHANGHAI (AP) — It is gold or bust for U.S. as the two-time defending World Cup champions try to become the first nation to win three straight.

Serbia, Spain and Greece are among the top teams that won’t make it easy for the Americans.

The tournament starts Saturday and there will be two teams advancing from each group to the round of 16, which begins on Sept. 6. Quarterfinal play starts Sept. 10, semifinals are on Sept. 13 and the championship game is in Beijing on Sept. 15.

Capsule previews for the eight groups: