Only 5 perfect brackets remain in the NCAA men's tournament after Michigan State gets past Louisville to reach Sweet 16 There were just six Yahoo Sports users who made it through the first round of the tournament unscathed. Content Original Link: https://sports.yahoo.com/mens-college-basketball/article/only-5-perfect-brackets-remain-in-the-ncaa-mens-tournament-after-michigan-state-gets-past-louisville-to-reach-sweet-16-211830747.html