North Carolina head coach Roy Williams had a good seat for the national title game between Wisconsin and Duke. Instead of taking that spot, he decided to make a lovely tribute to the father of Badgers coach Bo Ryan.

Sect. 140, Row A, Seat 13 will be left open for tonight's game. Roy Williams has donated that seat to the memory of the late Butch Ryan. — Wisconsin Basketball (@BadgerMBB) April 7, 2015

Bo and Butch Ryan never missed a Final Four. Touching gesture from Coach Williams @UNC_Basketball pic.twitter.com/oEbdrJUEqa — Wisconsin Basketball (@BadgerMBB) April 7, 2015

Butch Ryan passed away in August 2013. Before his death, he indicated that he always wanted to see his son coach against Duke for the national title.

In less than two years, Bo has Wisconsin close to winning its first championship since 1941.