PHILADELPHIA — So much was going to have to go right for UCLA basketball, once again left without its leading scorer.

Another solid showing from its defense and continued strong post play from Xavier Booker was a start.

But there was no way the Bruins were going to beat UConn on Sunday night with the sort of sloppiness they displayed, the number of layups they missed or the number of times they fouled a 3-point shooter.

Ultimately, short-handed UCLA was no match for a deeper, more poised and simply better opponent.

Putting up a worthy fight until the final minutes, the seventh-seeded Bruins fell short during a 73-57 loss at Xfinity Mobile Arena in the second round of the NCAA Tournament.

The unraveling came in a blur. Having wiped out most of a 12-point deficit, the Bruins twice took shots that could have brought them within two. They missed both.

UCLA’s Trent Perry then fouled Braylon Mullins on a 3-point attempt — joining Jamar Brown and Donovan Dent in making that blunder — and the Huskies were off on a 9-0 run that gained momentum with a technical foul on UCLA coach Mick Cronin, which came after he appeared to sarcastically applaud a non-call on a blocked Perry layup in which there might have been contact by the defender.

That was pretty much it.

Addressing the sin of fouling jump shooters, Cronin said he would have forced his players to run if they had another practice.

“That is mind-boggling,” Cronin said. “That is sickening to me. That is sickening. I have certain pet peeves, and that’s one of them.”

Capitalizing on the mistakes, the Huskies (31-5) advanced to play third-seeded Michigan State in an East Regional semifinal on Friday at Capital One Arena in Washington, D.C.

For the Bruins (24-12), it’s a second straight second-round exit after having missed the NCAA Tournament the previous year, necessitating some hard questions about the need for a new approach.

Cronin wouldn’t discuss the future other than to say he wanted an extra $5 million to pay his players.

Booker scored a team-high 13 points and Dent added 11 points and nine assists, but too many of their teammates struggled. Perry made just 2 of 8 shots, and the Bruins got only five points from their bench.

“We missed a good amount of easy shots that we all normally make,” said Dent, who made only two of nine shots, “myself included.”

Cronin said the Huskies’ physicality on defense bothered his team, particularly Perry.

“Blame me, but we didn’t play well enough,” Cronin said. “You’re not going to score 57 points and beat anybody in this tournament, let alone UConn. That’s because we didn’t finish at the rim.”

UCLA looked like it was finished midway through the second half when UConn’s Alex Karaban (a career-high 27 points) buried a 3-pointer to put the Huskies up by 12 points.

That’s when the Bruins rolled off eight straight points, including an Eric Dailey Jr. driving layup in transition in which he was fouled. After Dailey made the free throw, UCLA was down only 56-52.

They would come no closer.

Cronin said he regretted his defensive approach on Karaban, who made 9 of 16 shots and 4 of 8 3-pointers.

“If I had to do it over again,” Cronin said, “I probably would have put a guard on him and try to have our guy that started off on him guard somebody else on the wing.”

The Bruins were once again without star forward Tyler Bilodeau, who participated in the morning shootaround but did not make sufficient progress in his recovery from a sprained right knee to play. It was the third straight game Bilodeau has missed since going down in the Big Ten Tournament.

Bilodeau suggested after the game that he wasn’t on the verge of returning to face the Huskies.

“It still would have been a little time” before coming back, Bilodeau said. “I was hoping we could win this game and try to come back next week.”

Meanwhile, UConn celebrated the return of point guard Silas Demary Jr., who had missed the team’s first-round victory over Furman with an ankle injury he sustained in the Big East Tournament. Huskies fans cheered when Demary entered the game several minutes into the first half.

Injuries have had a way of influencing — or precluding — games involving UCLA and UConn.

In 2023, the Bruins might have faced the Huskies in the Elite Eight had UCLA not lost forward Jaylen Clark to an Achilles injury and center Adem Bona to a shoulder injury. Bona attended the game Sunday, sitting across from the Bruins’ bench.

It wasn’t all that long ago that Cronin told his players they were part of his worst defensive team in 23 years as a head coach.

He wasn’t trying to be mean, just relaying a fact according to metrics that backed up his words.

Redoubling their efforts and benefiting from a few schematic tweaks, the Bruins pulled together to become far more disruptive, sparking a late-season run. 

But it couldn’t sustain them on a night when they needed so much more.

“I feel horrible for T.B,” Dent said. “No one wants to go out like that as a senior; I wish we had him out there as a senior. He’s one of the key parts of our team. We really missed him and tried to win today for him so he could get one last game in his career.”

As reporters entered the UCLA locker room, the quiet was broken only by players’ hand slaps and sobs. Some players sat at their lockers, towels draped over their heads, while others embraced.

“It’s hard for our seniors,” Dailey, who has one more season of eligibility remaining, said later in the interview room. “Those guys are crying in the locker room right now. It’s not a good feeling. I just want to be there emotionally for my teammates right now. That’s all I can do.”