Chicago — The initial optimism surrounding Kris Dunn’s status following his nasty fall in Wednesday’s loss to the Golden State Warriors faded with further testing on Thursday.

The Bulls’ guard indeed suffered a concussion and won’t travel on Friday when the team leaves for a three-game trip beginning Saturday in Atlanta. In a release, the Bulls said the former New London High School All-American “will be out indefinitely” after entering the league’s concussion protocol.

Dunn will have to pass a series of tests before being cleared to play.

The initial test results, released late Wednesday, showed Dunn to be clear of concussion symptoms with “chipped and dislocated two front teeth” his casualties. Coach Fred Hoiberg said Dunn “took a good little chunk out of the floor” when he landed on his face while awkwardly descending from a dunk with 2 minutes, 52 seconds left.

The Bulls said those teeth were “stabilized and have been splinted with braces.”

Dunn is averaging 13.7 points, 6.4 assists and 4.6 rebounds in his second NBA season and first with Chicago.

Jerian Grant, whom the Tribune reported recently has been shopped in trade talks, has been playing backup point guard and could start. With Zach LaVine’s minutes set to increase, he also could spend time at the position in Dunn’s absence.

The Bulls also have Antonio Blakeney and Ryan Arcidiacono on two-way contracts. One is expected to be called up from the Windy City Bulls of the G League for at least the Hawks’ game.