Chicago's big second quarter forced Milwaukee to play "uphill" for the remainder of the game, Bucks coach Jim Boylan said.
"We just didn't have enough in the tank. It was their typical game; they're a good, physical team and they play a physical brand of basketball and it took its toll on us tonight," he said.
Ilyasova admitted that the Bucks weren't effective on offense throughout much of the game.
"Offensively, we looked a little tired. We couldn't make some open shots," he said.
The Bulls scored a season-high 66 points in the paint.
"We needed to stop the guy with the ball in the paint," Ilyasova said. "We have to play a little more aggressive next time defensively."
The Bulls took a 23-19 lead at the end of the first quarter, paced by Taj Gibson's six points and four rebounds. The Bucks were led by Dalembert's seven points and five rebounds in the period.
Boylan said he didn't think Jennings, who wasn't available for comment after the game, was forced off his game because of his heated head-to-head battle with Robinson.
"Even though he and Brandon are going at it, I don't think it's taking away from Brandon's game," Boylan said.
Butler viewed it differently.
"They were going at it. Brandon Jennings is a big-time player but you get frustrated, a lot of different things can happen and he definitely got frustrated," Butler said.
NOTES: Bucks forward Larry Sanders sat out Wednesday's night game due to illness. Milwaukee coach Jim Boylan said Sanders was ill during Tuesday's game in Detroit against the Pistons, where he was limited to 16 minutes and scored three points. Samuel Dalembert started a hamstring injury suffered in Tuesday night's game against Charlotte. Gibson replaced him. ... Boylan said he thought Jennings should have been named to replace injured Celtics guard Rajon Rando on the All-Star team. "I thought Brandon deserved to be selected the way he's been playing recently," Boylan said. Brooklyn's Brook Lopez was chosen over Jennings. ... Due to an engine issue with the team plane, the Bucks returned to Milwaukee around 11 a.m. Wednesday. The team had expected to fly out of Detroit on Tuesday night. ... Chicago has won six consecutive games at the Bradley Center. The Bulls' last loss in Milwaukee was 96-93 on Jan. 8, 2010.