After closing the first half on a 17-4 run, the Illini didn’t let Michigan get closer than seven until Darius Morris took over late.
The Hawkeyes would not go away, yet the Illini were able to prevail 81-68 to keep their NCAA Tourney chances alive.
Illinois seeks home win to stay in NCAA tournament consideration.
Ohio State scored 14 straight points in the second half to rally past Illinois on Saturday.
Illinois tied the game with 20 seconds left, go-to guy Battle set up for the last shot. His off-balance attempt in the lane bounced off the rim and into the hands of Jones, the 6-foot-10 center who dunked in the go-ahead bucket.
Mike Tisdale added 13 points, Mike Davis had 12, Meyers Leonard and Jereme Richmond had 11 each and D.J. Richardson finished with 10.
Even though the Illini (10-2) have lost just twice this season, Weber sounded like a coach overseeing a three-game skid.