Update 2:19 p.m.: No official description of the injury has been released, but Irving tweeted to say he's fine.
Im all good everybody, just a tough fall. Appreciate the concern #ontobarcelona— Kyrie Irving (@KyrieIrving) September 4, 2014
A GIF of the injury via GIFd Sports:
Irving took quite a while to get up and was eventually helped back to the locker room.
Irving's fall is sure to revisit the questions about stars playing in the tournament after Paul George's leg injury in exhibition play. Irving scored eleven points and added six assists to help Team USA pull away from a Ukrainian team that actually lead by as many as seven in the first quarter before Team USA righted the ship.