Derrick Rose sprains ankle in first

CHICAGO -- Derrick Rose exited the court with a left ankle sprain late in the first quarter on Saturday, but returned early in the second quarter and told Chicago Bulls coach Tom Thibodeau that he is fine.

Thibodeau said he wouldn't know how severe Rose's injury is until he talks to head trainer Fred Tedeschi.

"I haven't talked to Fred yet so I don't know what the extent of it is, but [Rose] said he was fine so ... we'll see," Thibodeau said after the Bulls' 89-84 loss in Game 4 of the Eastern Conference quarterfinals against the Indiana Pacers. "Derrick, he doesn't leave the game unless he's hurt, so for him to leave I'm sure he tweaked it pretty good. He's done it before, he played through it. He said he was fine, but we'll see."

Rose had an X-ray after the game, and results were negative. He said after the game that his focus was just to get back on the court as quickly as possible.

"If anything, I'll be able to rest in a couple of days," he said of his thought process at the time. "The best thing to do is tie up your shoes tight and just keep playing.

"I just wanted to come [back] quick. They were trying to sit me down and I didn't want to sit back down. My thing was just keep it moving and hurry up and put me back in the game."

Rose turned his ankle while driving to the basket for a shot late in the first quarter. He didn't appear to make contact with any other player.

"I really can't explain it," Rose said. "I just took off wrong and my weight just pushed over my ankle and it ended up twisting."

Before leaving the game with with 1:02 remaining in the first quarter, Rose had seven points. He finished with 15 and was just 1-for-9 from 3-point range.

Rose seemed to lack his usual explosiveness in the final three quarters, shooting just 3-for-16 from the field.

"No excuses. Playoffs," Rose said. "I sprained my ankle many times. I just wasn't able to make shots."

Despite his reluctance to use his injury as an excuse, he did admit that it likely affected his play.

"Of course when you twist your ankle it's going to slow you down a little bit," Rose said. "My shots were on target, they were just coming up short."

Bulls forward Luol Deng said he didn't notice a difference in Rose after the injury.

"I even forgot that happened," Deng said. "I really don't know how his ankle is, but Derrick played hard. Derrick always plays hard. He's out there hustling."

The Bulls lead 3-1 in the best-of-seven series. Game 5 is Tuesday at the United Center.

ESPNChicago.com's Nick Friedell contributed to this report.