North Carolina legend Dean Smith and Duke head coach Mike Krzyzewski helped grow the greatest rivalry in college basketball, and although the two coaches were fierce competitors, they developed a close friendship after Smith retired in 1997. Smith held a 24-14 record against Krzyzewski’s Blue Devils and retired as the winningest coach in major men’s college basketball history — a mark Coach K would surpass in 2010.

In a statement released by Duke University, Krzyzewski said that Smith was “one of a kind.”