Mike Krzyzewski is clearly upset over his grandson's weekend arrest ... 'cause the Duke coach told reporters Tuesday he considers it a "violation of our standards."
The 74-year-old -- who's in his final season as the Blue Devils' head man -- spoke for the first time publicly about Michael Savarino's Sunday arrest ... and he promised he and his team will "handle that."
Unclear what any sort of punishment will be -- but it should be noted, Savarino, who's been playing for Coach K since 2019, was not spotted at Duke's game Tuesday against Gardner-Webb.
"We're already handling it," the coach said after beating Gardner-Webb, 92-52. "But, it's a violation of our standards. That's it."