Bobby Conrad made eight of Clemson's 15 foul shots in overtime to boost the Tigers to an 87-82 upset of No. 1-ranked Duke in an Atlantic Coast Conference basketball game tonight.

Duke, now 12-1, held the ball for four minutes in order to have the last shot of regulation play with the score tied at 66. But freshman Chip Engelland's 40-foot desperation shot bounced off the rim at the buzzer.

Clemson, 11-1 and ranked 18th in the latest Associated Press poll, sank 15 of 17 shots from the foul line in overtime.

Clemson led by as many as 10 points in the first half before Duke came back to take a two-point lead, 43-41, at the half.

The teams traded baskets through the second half until Duke went into a stall.

Center John (Moose) campbell paced the Tigers with 23 points, while Billy Williams scored 19 and Larry Nance chipped in with 14 points and 11 rebounds. Conrad added 10 points for the Tigers.

Duke got 31 points from Gene Banks and 30 from Mike Gminski, who also had 10 rebounds for the Blue Devils.

The Tigers threatened to pull away in the first half, leading 38-28 with five minutes left in the half.