There are two NCAA Tournament brackets that remain perfect early on the fourth day of this year's Big Dance.
Neither of the perfect brackets exist on ESPN's Tournament Challenge, arguably the most-popular spot for bracket picks. Instead, one is on the NCAA's bracket challenge, with the other on Yahoo's.
Both of these brackets got the first game of the day right, taking Tennessee over Iowa. Both also have North Carolina taking down Washington.
Here's a full look at their picks for today:
The Final Fours for the two brackets are as follows:
The Final Four teams for the bracket on Yahoo! Sports features Michigan State, Michigan, Tennessee and North Carolina.
The Final Four for the bracket on the NCAA website has Duke, Gonzaga, Virginia and Kentucky.
No one has ever had a perfect NCAA Tournament bracket, at least on record. Both of these brackets have a long way to go, of course, but it's possible one of them could stay perfect through the first weekend.