There have been a few constants for Duke this season. One is winning, as the No. 1 Blue Devils are 11-0. Another is Mason Plumlee, who has been Duke’s go-to guy night in and night out. And, not to be forgotten, the nightly questions about team chemistry.

After every game—every single one—there are at least two questions about Duke’s chemistry. Thursday night after Elon was no exception. When head coach Mike Krzyzewski was asked when the last time Duke had this good of chemistry this early in the year, he paused.

“Even ’10, I thought we had good chemistry, but it really got good in February,” Krzyzewski said of his most recent national championship team. “I’ll tell you what, Kyrie’s freshman year (2010-11), I thought we could maybe run the table. We had good chemistry right away with that group.”

So, Duke’s chemistry hasn’t been this good since the last time the Blue Devils were ranked No. 1, and, since we’re talking about Duke, that was just two years ago. And before that, you’d have to go back a whopping three years, and the chemistry improved right as the team improved (it was against Maryland on Saturday, Feb. 13, 2010, Brian Zoubek scored 16 points and pulled down 17 rebounds in 22 minutes, and that was the start of the Blue Devils’ run to Indianapolis).

After a freshman season in which he provided Duke with its most enduring memory of the year, Austin Rivers announced Monday that he will hire an agent and enter the 2012 NBA draft.

“I would like to thank the coaches, my teammates and the fans for helping make this past year at Duke so special,” Rivers said in a release provided by Duke. “Coach K and the rest of the staff really helped me develop and improve in all areas of the game.

“It was a difficult decision to leave Duke, but I am excited about chasing my dream of playing in the NBA.”

Austin Rivers is huddled with his family in Florida this weekend to decide whether he will return to Duke for his sophomore season or declare for the NBA.

CBS Sports’ Jeff Goodman reported that Rivers will sign with an agent and forgo his final three collegiate seasons, but Jeremiah Rivers, Austin’s older brother, said a final decision has not been made.

“We haven’t talked about it yet,” said Jeremiah Rivers, who is with his brother just outside of Orlando, Fla. “He had a really good year, obviously. But as far as my brother coming out, he hasn’t even mentioned it.”

DURHAM – A week ago, Duke was starting what it hoped would be an extended stay in the NCAA tournament.

After Friday’s unexpected loss to No. 15 seed Lehigh, the Blue Devils now find themselves beginning to confront an offseason that will feature its fair share of uncertainty.

Most immediately, Austin Rivers and Mason Plumlee will have to decide whether to leave for the NBA. Both are projected as first-round picks on multiple projection websites, although neither seem likely to be top-10 selections.

Updated 7:48 p.m.

ATLANTA – Austin Rivers rued the fact he didn’t do exactly what he planned when he had the chance to send Duke’s semifinal against Florida State to overtime.

Seth Curry didn’t have time to think through what he wanted to do with his desperation attempt at the buzzer.

Either way, Duke’s top perimeter scorers missed 3-point heaves in the final seconds, allowing Florida State to eke past the Blue Devils for a 62-59 victory. The third-seeded Seminoles (23-9) will face top-seeded North Carolina (29-4) in Sunday’s championship.

Duke's Austin Rivers lead the Blue Devils with 17 points, including the final basket to seal the win.

Updated 10:54 p.m.

ATLANTA – As Duke moved the ball around the perimeter in the second half of its 60-56 win over Virginia Tech on Friday night, Tyler Thornton saw that Seth Curry was going to catch it with what looked like enough space to get off an open 3-pointer from the wing.

“Shoot it, Seth,” Thornton yelled.

At the last second, a Virginia Tech defender lunged at Curry, forcing him to pass to a wide-open Thornton in the corner. With the Hokies showing little inclination to close out on him, Thornton squared up and let fly with another 3-pointer.

That attempt splashed through the net.

The ACC announced on Monday its annual men’s basketball all-conference, all-defensive and all-freshmen teams. The honors are as follows, with voting point totals in parentheses:

DURHAM -- About five minutes after North Carolina put the finishing touches on its 88-70 win over Duke on Saturday night, the Blue Devils players made their way back onto the court at Cameron Indoor Stadium.

Miles Plumlee addressed the remaining crowd, thanking the Duke students for their support during his career. He then said the Blue Devils would make amends for its disappointing performance against the Tar Heels by reaching the Final Four.

Such a promise required a bit of a leap of faith after Duke’s miserable effort in the first half against UNC. But if the fourth-ranked Blue Devils (26-5, 13-3) have shown nothing else this season, it’s that they have the ability to defy expectations in both directions.

Updated 4:28 p.m.

DURHAM – Duke betrayed its weariness throughout its 70-65 overtime win over Virginia Tech on Saturday.

Austin Rivers would drive to the basket with some fancy footwork, but his shot would stay on the front rim, lacking the energy to tumble through the hoop. Or Rivers would get to the free-throw line and then miss one of his two shots by leaving the ball short.

Seth Curry would rise for an open 3-pointer, overcompensate for his tired legs and watch the ball sail long.

During one stretch in the first half, the entire Blue Devils team passed on the opportunity to dive on the floor for a loose ball. Duke coach Mike Krzyzewski called a timeout after that and chewed out his players for their lethargy.