Grant Williams scored with 14.5 seconds remaining in overtime and James Daniel sank two free throws with two seconds to go as Tennessee upset No. 18 Purdue 78-75 in the opening round of the Battle 4 Atlantis in the Bahamas on Wednesday.

Williams scored all 22 of his points after halftime and Lamonte Turner added 17 for the Volunteers (3-0), who outscored Purdue 8-2 in the final 1:31. Turner forced overtime with a tying 3-pointer with 5.1 seconds remaining in regulation.

Purdue (4-1) got 21 points from Carsen Edwards, 15 from Dakota Mathias, 13 from Isaac Haas, and 11 each from Vince Edwards and P.J. Thompson.

Tennessee used a 16-0 run to close the first half and begin the second to take a 38-31 lead.

The Volunteers finished the first half with a 15-4 run in the final 5:01, erasing a 27-16 Purdue lead and pulling even at 31 through 20 minutes

The Volunteers used seven 3-pointers or three-point plays to crawl back into contention. Purdue had five 3-pointers and one three-point during the opening half when it got 10 first-half points from Edwards. Thompson added six for the Boilermakers on a pair of 3-pointers.

Turner led the Volunteers with nine first-half points.

Purdue was only 5 of 13 from 3-point range in the first half, and Tennessee was 4 of 12, but the Volunteers out rebounded the Boilermakers 23-17 during the first 20 minutes.