Robinson came off the bench and scored 19 points, and Carlos Boozer notched his seventh double-double in nine games with 14 points and 10 rebounds for Chicago.
"Something we have to do is take care of the ball down the stretch," Robinson said. "For this loss, I definitely take the blame. Down the stretch I have to be smarter with the ball and make the right plays and execute."
Three of Robinson's four turnovers came in the fourth quarter.
West reached double-digits for a ninth straight game for Indiana, but his 10 points were a far cry from the 23 he had averaged over his last six games.
Indiana shot 31.6 percent from the floor in the first half, including 1 of 5 from behind the arc. The Pacers continued to struggle from long range, hitting 2 of 10 attempts, but tightened up inside, shooting over 40 percent in the second half.
Chicago shot 38.4 percent from the floor.
Both teams struggling from the field was little surprise, as Indiana (90.9 points allowed per game) and Chicago (94.4) came into the contest boasting two of the top-five defenses in the NBA.
Marco Belinelli scored six points with an assist and a turnover in his first start for Chicago, playing in place of the injured Richard Hamilton. Hamilton is out indefinitely after suffering a torn plantar fascia in his left foot during Saturday's 93-88 win over Philadelphia.
Hamilton's injury left the Bulls even thinner at the guard position, with former MVP Derrick Rose sidelined due to surgery in May to repair a torn ACL in his left knee.
NOTES: Rose was seen shooting around at the United Center earlier Tuesday, but Thibodeau remained stalwart in his preseason resolution to avoid talking about Rose's rehab at length. "Derrick's focused on his rehab, we're focused on our improvement and our opponent. So he's doing fine," Thibodeau said. ... Vogel acknowledged F/C Tyler Hansbrough's struggle to adjust to decreased minutes. Hansbrough came in averaging just 6.5 points per game and went scoreless on Saturday against Golden State, missing all five field goal attempts. "He's got to figure it out," Vogel said.
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