Shumpert scored 24 points, including nine in a row late in the second half, and Derrick Favors added 14 points to lead Georgia Tech to a 73-68 victory over Boston College on Saturday.
Georgia Tech (19-9, 7-7 Atlantic Coast Conference), improved to 14-1 at home. The Yellow Jackets had lost three of four.
Boston College (14-14, 5-9) was led by Joe Trapani with 26 points. Reggie Jackson added 13 points and Corey Raji had 12 for the Eagles, who had their two-game winning streak snapped.
"Late in the game I thought Iman made great decisions getting into the high paint and shooting over his defender," said Georgia Tech coach Paul Hewitt. "He made two shots that I thought really decided the game."
With Georgia Tech leading 56-45 with 8:49 left, Shumpert hit four consecutive shots, including a 3-pointer, and the two that Hewitt referred to. They gave the Yellow Jackets a 65-53 lead with 4:06 remaining.
"When he's good, he's really good," said Hewitt, adding the difference in Shumpert, a sophomore guard averaging 9.2 points a game, is being aggressive.
"Yes. It's that simple. And decision making. I told him that the guy I saw in the last 10 minutes today is not allowed to leave until the season is over. Iman is the X-factor."
"The real difference was Shumpert. He made some shots today that I don't know if he's been shooting that well this season," said Boston College coach Al Skinner.
The Yellow Jackets' biggest lead of the second half was 15 at 54-39 with 11:24 left and led 73-61 with 22 second left before the Eagles scored the last seven points.
Shumpert hit a 3-point basket on the first possession and the Yellow Jackets went on to a 7-0 lead and never trailed.
Boston College had 21 turnovers and 10 shots blocked.
"No question about it. We mishandled the basketball, and it led to run-outs (easy baskets) for them. That's really what the problem is. It's one thing to turn it over, but it's another thing to turn it over and lead to run-outs for them. It gave them easy opportunities," Skinner said.
The Yellow Jackets had their biggest lead of the first half at 30-16 with 6:50 left. Maurice Miller had five points in the run.
Boston College went on a 14-3 run to get within three on a 3-point basket by Joe Trapani with 2:22 left in the half. Tech's Zach Peacock scored at the 1:11 mark and Shumpert hit a layup at the buzzer for the 37-30 lead.