Toronto Raptors' DeMar DeRozan tries to shoot past Milwaukee Bucks' Giannis Antetokounmpo during the first half of Game 6 of an NBA first-round playoff series basketball game Thursday, April 27, 2017, in Milwaukee. (AP Photo/Morry Gash)
Toronto Raptors' DeMar DeRozan tries to shoot past Milwaukee Bucks' Giannis Antetokounmpo during the first half of Game 6 of an NBA first-round playoff series basketball game Thursday, April 27, 2017, in Milwaukee. (AP Photo/Morry Gash)

Chicago — If the Chicago Bulls are to extend their postseason, they almost certainly will have to do it without Rajon Rondo.

Rondo has a fractured right thumb, and coach Fred Hoiberg says the backcourt catalyst is a “long shot” to play Game 6 against the Boston Celtics on Friday night. Nor does the coach expect Rondo to be available if a Game 7 is necessary. The veteran guard is scheduled to work out Thursday night.

“Nothing has changed as of now,” Hoiberg said during a conference call Thursday.

Hoiberg says guard Isaiah Canaan will start in Rondo’s place for a second straight game. The Celtics lead the first-round series 3-2.

Since Rondo injured his hand in Game 2, Boston won three straight. The Bulls averaged only 93.0 points in those games compared with 108.5 in the first two.

Hoiberg says his team played most of the Game 5 loss in Boston without a point guard on the floor.

“But just that’s the reality of the situation that we’re in right now,” he said. “It’s probably going to be that way the rest of the series.”

Rondo was a standout at both ends in the first two games, both Chicago victories on the road. He averaged 11.5 points, 10.0 assists, 8.5 rebounds and 3.5 steals.

“We had a real good thing going with Rajon,” Hoiberg said.

“Our flow was excellent. Our pace was really good, just getting the ball down the floor early and striking before the defense was set. That’s something we had a lot of success with. Obviously, that part of our game has changed with Rondo out.”

Hoiberg says forward Jimmy Butler had “some soreness” in his right knee but would play Friday.

Thursday’s Game

Raptors 92, Bucks 89

Milwaukee — DeMar DeRozan scored 32 points and the Toronto Raptors squandered a 25-point lead late in the third quarter before holding on for a victory over Milwaukee to take their first-round playoff series in six games.

Cory Joseph had five points in a 9-0 run in the final 2 minutes, including a 3-pointer with 1:27 left, to help stave off the pesky Bucks.

The Raptors move on to face the Cleveland Cavaliers in the Eastern Conference semifinals in a series that starts Monday.

They’ll need to work on finishing off opponents in the second half.

Jason Terry’s 3 with 3:06 left gave the Bucks an 80-78 lead, completing an unlikely comeback from the 25-point deficit with 5:16 left in the third quarter. The Raptors looked as if they were on cruise control after DeMarre Carroll’s 3 gave them the 71-46 advantage.

Giannis Antetokounmpo spearheaded the second-half rally for Milwaukee. He had 34 points.

But the Bucks finished one comeback short.

The furious effort appeared to sap the energy of the young Bucks. Even Antetokounmpo, a renowned gym rat, looked tired with his hands on hips as he caught his breath during fourth-quarter breaks. He played 47 minutes.

Antetokounmpo finished 13 of 23 from the field but was 2 of 6 in the fourth.

The Raptors could finally breathe easy after DeRozan went 2 of 2 from the foul line with 3.1 seconds to play for a three-point lead. Tony Snell’s inbounds pass on the ensuing possession was intercepted by DeRozan.

Rebounding from 2-1 series deficit and an embarrassing 27-point loss in Game 3, the Raptors will face Cleveland a year after losing to the Cavaliers in the Eastern Conference finals in six games.

Kyle Lowry added 13 points for Toronto.