It's official: The Boston Celtics are locked into the No. 3 seed for the Eastern Conference playoffs.

The C's clinched the No. 3 seed following the 2-seeded Toronto Raptors' win over the Memphis Grizzlies on Sunday. That means the focus now is on who their first-round opponent (No. 6 seed) will be.

Don't miss NBC Sports Boston's coverage of Celtics-Grizzlies, which begins Tuesday at 4 p.m. with Celtics Pregame Live followed by tip-off at 5 p.m. You can also stream the game on the MyTeams App.

As of Sunday, the Philadelphia 76ers (42-27) hold the No. 6 spot with games against the Portland Trail Blazers, Phoenix Suns, Toronto Raptors, and Houston Rockets left on their schedule.

The Miami Heat and Indiana Pacers currently both have 43-27 records and the No. 3 and No. 4 seeds respectively, so any of those three teams are in the running to be Boston's first-round matchup.

The C's will look to improve to 47-23 on the season (4-2 in the Orlando bubble) when they take on the No. 8 Orlando Magic on Sunday evening. Then, they'll wrap up their regular season with matchups against the Memphis Grizzlies on Tuesday and the Washington Wizards on Thursday.

You can catch all of the action right here on NBC Sports Boston.