Todd Day scored a career-high 31 points to lead Milwaukee.
"Todd Day, you got a problem with how I run things?"
Todd Day was high man for Milwaukee with 17 points, 9 of them coming in the first nine minutes of the fourth quarter.
Todd Day, a guard, made four 3-pointers, which kept the Razorbacks (8-2) close until the final minutes.
Arkansas still led, 62-57, with 12:10 remaining after a rebound basket by forward Todd Day.
Boston called a timeout, setting up a final shot for Todd Day.
Todd Day was one of three Arkansas players in double figures.
Todd Day scored 20 of his 26 points in the second half for Arkansas.
"We got a little anxious," said Todd Day, who scored only 12 points on an off day of 5-of-17 shooting.
Todd Day added 26 points and David Wesley had 25, including three key 3-pointers in the final quarter.