Updated

Only a few days into the college basketball season, the Champions Classic might just be a sneak preview of the Final Four.

Top-ranked Kentucky vs. No. 2 Michigan State is the marquee matchup in the tournament Tuesday night at the United Center in Chicago. It's the earliest in the season the top two teams have faced each other, and the first game between Nos. 1 and 2 since 2008.

Duke and Kansas play in the nightcap, giving the tournament four of the top five teams in the country.

Michigan State coach Tom Izzo says he hasn't been this excited about a game in "a long, long time." It's a great showcase for college basketball, and Izzo says there's no downside, win or lose.