Coach K was having a tough time, and deservedly so.

I watched Mike Krzyzewski’s press conference after his team beat Pitt Tuesday night, when he said the Blue Devils played tired for much of the game. But it was Coach K who looked like he hadn’t slept in two nights.

He said his team was “in a war” against the Panthers, coached by his former player and assistant Jeff Capel. “He’s my son, we’re part of a brotherhood, I love Jeff,” he said. “Playing against him is very difficult, I don’t like it.”

Krzyzewski was caught yelling at the Cameron Crazies in the first half and started scolding them when he left the court at halftime. The Crazies were chanting, “Capel, come sit with us!” –  an innocuous cheer considering the words Duke students have hurled at other opposing coaches over the last 40 years.

So, when he heard Capel’s name, Coach K thought the worst. He apologized to the students, but allowed he’d “rather make a mistake in protection of my guy.”

Soon, he acknowledged the other thing was going on, touching the shirt he was wearing and recalling the ceremony before the game.  Krzyzewski was Kobe Bryant’s coach on the Olympic teams that won gold medals in Beijing (2008) and London (2012) and he and his wife were very close with the former Lakers star, who was killed with his 13-year-old daughter in the shocking helicopter crash on Sunday.

Duke held a moment of silence for Bryant and legendary former ACC commissioner Gene Corrigan, who died the day before at 92. Krzyzewski and his staff wore purple and gold numbers 8 on the front and 24 on the back of their shirts.

“It’s been bad,” Coach K said, “I’ve been very emotional, privately. Kobe was the key guy in building the culture on those teams, he and LeBron. Those were moments in time that don’t happen for everybody. He was amazing with my grandkids. Micki had an unbelievable relationship with Kobe.

“And the others, 9 people. Horrific, so very tragic,” he said.

Indeed.