The SEC took down the Big 12 in the annual SEC-Big 12 Challenge for the first time ever this year.

On Sunday, it’ll be interesting to see if Auburn and Texas A&M can win what is essentially an SEC-ACC challenge, with two spots in the Sweet 16 on the line. The Tigers are taking on a different set of Tigers when they tip off against Clemson Sunday at 7:10 p.m. Eastern time. The Aggies, on the other hand, will take on the defending champion North Carolina Tar Heels at 5:15 p.m. Eastern time.

The games should be exciting to watch, especially if Texas A&M and Auburn can carry some momentum into the matchups after big wins in the first round of the NCAA Tournament. Kentucky is already through to the Sweet 16, but Tennessee, Florida and Alabama all fell on Saturday night.

Therefore, it’ll be up to the Aggies and the Tigers to make sure the SEC is well-represented in the next round of March Madness.

Here are two important matchups to watch when the Aggies and Tigers play on Sunday night:

Experience vs. athleticism

The first matchup featuring an SEC team — North Carolina vs. Texas A&M — will feature two very different point guards. North Carolina’s Joel Berry is a senior who is averaging 17 points, 3.5 rebounds and 3.5 assists per game. Meanwhile, Texas A&M’s TJ Starks is a freshman who has only started becoming a star lately.

While many will (rightfully) be watching to see how Texas A&M big men Robert Williams and Tyler Davis fare against North Carolina star Luke Maye, the more critical battle will take place at the point guard position.

Berry is one of the most-experienced players in today’s college game, as he has been to two Final Fours and led the Heels to last year’s title. Starks, meanwhile, didn’t earn the starting job until the end of the regular season. He took over early in the second half of A&M’s opening round win over Providence, though, helping the Aggies pull away by scoring 15 points and dishing out eight assists.

Starks may be the more athletic player between him and Berry, but Berry has been in situations like this before, so we’ll have to see if his veteran savvy pays off.

Elijah Thomas vs. Auburn’s big men

Clemson relies a lot on Thomas’s rebounding ability, as the 6-9 forward (who, interestingly, started his college career at Texas A&M) averages eight rebounds per game. He only scored six points in the Round 1 game against New Mexico State, but he grabbed 10 rebounds to help the Tigers win.

That poses a problem for Auburn, as coach Bruce Pearl’s squad is without F Anfernee McLemore. It’ll fall on Horace Spencer, Chuma Okeke and DeSean Murray to control the boards and prevent Thomas from creating second-chance opportunities for Clemson.

Since Clemson is without F Donte Grantham, Thomas is the guy Auburn needs to control on the glass. It won’t be easy, but in close games, winning the rebounding battle is critical. Both teams are without a talented big man for the game, but those players who do take the court will need to step up if they want to advance to the next round.