Drexel was in the situation all big underdogs dream of being in: up 19 points on a nationally ranked team and the shots are falling like there's only one team on the court.

Things didn't last much longer for the Dragons and No. 4 Arizona used a 25-4 run spanning halftime to wipe out the deficit and go on to a 66-62 victory Wednesday night in the semifinals of the NIT Season Tip-Off.

"They must have come out in thinking we weren't that good but we punched them right in the face," said Drexel's Chris Fouch, who scored 29 points. "We knew they were going throw punches back and we had to take them.'

The Dragons went cold from the field and Arizona started making the shots it missed early and also started to get more aggressive on the boards, especially on the offensive end.

"I thought we played good the whole game," Drexel coach Bruiser Flint said. "In the second half they got some second chance points by keeping the ball alive."

Arizona coach Sean Miller disagreed with Fouch about his team's approach to the game.

"I think the story line for this game may be that Arizona was overlooking Drexel but that's the furthest thing from the truth," Miller said. "We watched every tape and invested a lot of time and it became apparent to me we were in for a handful."

It was a lot more than a handful early.

Nick Johnson scored 20 points and freshman Aaron Gordon had 10 points and 13 rebounds for the Wildcats, who used a 25-4 run spanning halftime to wipe out the 19-point deficit and take their first lead of the game, 33-31 on a basket by Brandon Ashley with 16:11 to play.

That was the first of 11 lead changes in a span of 8 1-2 minutes as the Dragons stayed around a lot longer than most thought they would.

"Down 19 points is a pretty good lesson right there," Miller said. "We were on the verge of getting blown out. In the second half we shared the ball and we were patient. That's what we did in the second half."

The Wildcats (6-0) will face the winner of the No. 6 Duke-Alabama semifinal on Friday night for the championship at Madison Square Garden.

"We're a program that has come to expect success in tournaments and we know we have to play better in the championship game but we're looking forward to the opportunity," Miller said,

Kaleb Tarczewski had 15 points and 10 rebounds for Arizona, which shot 46.7 percent in the second half (14 of 30) after shooting 26.1 percent (6 of 23) in the first half.

"We kind of came out flat in the first half but we wanted to come out strong in the second half," Tarczewski said.

Frantz Massenat added 17 points for the Dragons (3-2).

Drexel scored the first nine points of the game and combined its hot start from the field with Arizona's miss after miss to take a 27-8 lead with 7 minutes to go in the first half.

Drexel made 11 of its first 21 shots from the field in taking the 19-point lead while the Wildcats started 3 of 17 and they uncharacteristically didn't take care of the ball.

They finished the half with 10 turnovers, their average for a game this season. They finished with 14.

Even though Drexel cooled off — the Dragons missed 10 straight shots after the hot start — the closest Arizona could get was 27-19 on an 11-0 run in which Johnson had six points.

The Dragons led 29-20 at halftime, the first time this season Arizona was behind after 20 minutes.

Arizona, which came in averaging 84 points a game, took the lead for good at 46-45 on a dunk by Tarczewski with 7:21 to play. The Wildcats finally opened some space by taking a 54-47 lead as Drexel continued to struggle with its shooting. The Dragons finished at 36.6 percent (26 of 71).

"I'm disappointed. We were up 19 and then didn't make the plays we needed to in the second half," Flint said. "We had our opportunities. They're a good team and you knew they were going to make a run. In order for us to win these games we have to make plays. We didn't. We're good enough to make them but didn't."

Drexel forward Damion Lee, who finished with six points went down with a knee injury with 10:15 to play. He was helped to the locker room without putting any pressure on his right leg and never returned.

"There's nothing I can say right now," Flint said. "He could put pressure on it in the locker room and they said they didn't think there was anything structurally wrong."

Massenat said that when he went to Lee while he was on the court, "he said 'It's my knee.' ... It looked like he was really hurt."

Drexel came into the game with a 2-9 record against ranked teams under Flint and the highest ranked of the wins was No. 20 Louisville on Dec. 14, 2010.

Arizona came in with a 20-2 record in the NIT Season Tip-Off and its three championships were tied for second behind only Duke's four titles.

Drexel made one other appearance in the tournament and that was in 2005 when the Dragon also reached the semifinals where they lost to then-No. 1 Duke 78-68.