COLUMBUS, Ohio (AP) — Tennessee didn't let an underdog fight back again and pull off a shocker in the NCAA Tournament.

Last year the Volunteers advanced to the second round as a No. 3 seed and were stunned when 11th-seeded Loyola of Chicago hit a jump shot with 3.6 seconds left for a 63-62 win that sent the Ramblers and Sister Jean to the Sweet 16.

This time No. 2 seed Tennessee let No. 15 seed Colgate overcome a 14-point lead to tie the game midway through the second half and keep it close until the Vols pulled away late for a 77-70 win in the opening round Friday.

"I told the guys last night, don't expect it to be easy," Tennessee coach Rick Barnes said. "Even if we get up, which we did. And they fought back. (There) were really some uncharacteristic things that we did with our body language and things that we haven't done all year. And that's where I know that there was some anxiety with our guys."

Admiral Schofield had 19 points for Tennessee (30-5), which advances to play Iowa — winner of a first-round game over Cincinnati — on Sunday.

Jordan Bone added 16 and Jordan Bowden 14 for Tennessee.

"We know we've been in tougher positions earlier this year," Bone said. "So the key thing is just never get rattled, understand how hard we worked to get to this point, so there's no reason to get rattled."