About
The First and Second Rounds are the opening-weekend rounds of the NCAA Division I basketball tournaments that determine which teams advance to the regional semifinals (the Sweet Sixteen). These rounds have existed in various formats as the tournament expanded (including the introduction of the First Four in 2011) and are hosted at designated campus or neutral sites as part of the NCAA-run March Madness schedule. They are a key part of tournament play and media coverage, occurring during the tournament's initial weekend.
