Roy Williams reflects on his past career at Kansas as his No. 1-seed UNC Tar Heels prepare to face off with the No. 2-seed Kansas Jayhawks for a shot at the Final Four, and Jayhawks' coach Bill Self discusses the Heels.

The last time UNC coach Roy Williams faced his former employer, the Kansas Jayhawks, he called it “one of the worst nights of my career.”

That matchup occurred in the 2008 NCAA Tournament semifinals and when I spoke to him about it more than a year later during the research for Williams’ autobiography Hard Work, he could still recall in detail almost every play from that game.

He said he walked onto the court that night in San Antonio believing his team was going to play great. Before he knew it, the Tar Heels trailed 40-12.

He also admitted that he coached the game feeling so ill that he threw up into a towel and so dizzy that he had to hold onto a chair to keep from falling. At one point he asked his assistant coach Steve Robinson to call a play because he couldn’t.

Though the Tar Heels made a run in the second half, UNC lost 84-66.

“It felt like somebody reached in and grabbed my heart and shook it in front of my face,” Williams told me. “That Kansas game will eat at me for the rest of my career. Playing so poorly was bad enough, but playing so poorly against the team I coached for 15 years made it even worse. I wanted to win that game more than any game I have ever coached… Watching us play felt like a nightmare. I still to this day have not watched a tape of that Kansas game, and I probably never will.”

Think he wants to win this one?