Sunday is the last day of the regular season and not a single first-round matchup is set.

In one of the wildest finishes to an NBA regular season in recent memory, not a single first-round playoff matchup has been locked in heading into the final day. Every game on Sunday matters. Every single one.

The biggest showdown is Lakers vs. Nuggets, which will decide the 3 and 4 seeds in the West. Whoever wins gets homecourt in Round 1. In the East, the Raptors, Magic, and Sixers are fighting for the final playoff and Play-In spots — meaning someone's season ends Sunday.

The SoFi Play-In Tournament starts Tuesday, April 14, with the first round of the NBA Playoffs tipping off on April 18. After 81 games, it all comes down to one Sunday. This is why the regular season matters.