Men's March Madness bracket questions before Selection Sunday

UConn won both the Big East regular-season and tournament titles -- does this put the Huskies above Houston and Purdue in the race for the overall top seed? Sarah Stier/Getty Images

We finally made it. Selection Sunday. Less than 24 hours until the men's NCAA tournament field is revealed and millions of fans around the country can furiously fill out their brackets.

But let's not get ahead of ourselves. The NCAA tournament selection committee still has a few boxes to check before its work is over.

This year the bubble is as crowded -- and arguably better -- than we've seen in some time, with conference tournament performances likely securing bids for some teams (Mississippi State, Colorado, among others) and putting seemingly safe teams into precarious positions (Seton Hall and Virginia, to name two).

And with surprising losses from 1-seeds on Saturday, the top of the bracket is featuring plenty of movement as well.

How will the committee sort through how things have played out, from the top of the bracket through to the teams around the cut line? Here are the biggest questions the members have to answer.

1. Which team is the overall 1-seed?