The last perfect men's bracket was eliminated Friday.
By Saturday night, the field of perfect women's brackets was hanging on by a thread. Early Sunday, No. 7 Duke beat No. 2 Ohio State, leaving just four perfect entries remaining in Yahoo's women's tournament bracket game.
Lack of early upsets keeps perfect brackets alive
The field was whittled down to its last few Sunday after a handful of entries survived the first round. The second day of play on Saturday started with just 0.3% of entries in Yahoo's bracket contest left fully intact. Saturday's early slate of games didn't produce any upsets. Favorites UConn, Iowa, Indiana, Tennessee, NC State, Notre Dame and Kansas all advanced.
The results were enough to knock out all but 0.1% of the remaining perfect women's brackets.
By the time No. 7 Ole Miss beat No. 10 Marquette and No. 1 USC beat No. 16 Texas A&M-Corpus Christi, only 102 perfect brackets remained.
Wins by UCLA and West Virginia dropped the tally to 70. Gonzaga's win over UC Irvine dropped the number to 59. UCLA's win over Cal Baptist and Utah's win over South Dakota State each knocked out another bracket, bringing the total down to 57 Saturday night.
A first round that produced just one upset allowed those 57 perfect brackets to survive to the second round. But the second round started with an upset, leaving just four standing.
Men's perfect brackets eliminated early
On Friday, No. 13 seed Yale's upset of fourth-seeded Auburn torched the final remaining perfect men's bracket. One had remained after No. 10 Colorado's win over No. 7 Florida knocked out 12 of the then-remaining 13 perfect brackets.
The perfect men's bracket pool had previously been whittled down to 0.1% of entries on Thursday when No. 14 seed Oakland toppled No. 3 seed Kentucky in the biggest upset of the tournament.