Boston Celtics star Kemba Walker was diagnosed with "concussion-like symptoms".
Kemba Walker netted 20 points in total against the Golden State Warriors, continuing his run of scoring in the fourth quarter of games.
Gordon Hayward's broken hand is a major blow for the Boston Celtics, but Kemba Walker said: "We just have to hold the fort down."
After helping the Boston Celtics beat his old team, Kemba Walker spoke about the "special" reception he got from Hornets fans in Charlotte.
Taurean Prince led the way with a team-high 27 points for Brooklyn as they completed their comeback at Barclays Center.
The Boston Celtics will hope Kemba Walker has turned a corner after leading them to victory late on Friday.
"We had to replace Al Horford, who's a terrific player, and that's hard to do," Ainge said.
Team USA have lost back-to-back games with NBA players for the first time since 2002 after going down to Serbia on Thursday.
It's the first time Team USA has lost back-to-back games with NBA players since 2002.
The United States' defence of their FIBA World Cup title ended as the title favourites slipped to a 89-79 quarter-final defeat to France.