Smyrna and La Vergne haven't won a regular-season championship since being placed in Region 3.
That could change Friday night when La Vergne plays at Smyrna in a pivotal league contest. Both teams are 5-3 overall and 4-0 in league play.
"They know each other, they grew up with each other, they've played youth ball against each other and middle school football against each other," Smyrna coach Matt Williams said. "We've had a lot of games that have been nip and tuck.
"It's one of those deals where (La Vergne) coach (Mike) Woodward is doing a great job over there. This is a big game and our kids know it. We'll be excited and we know (La Vergne) will be excited. These are games you look forward to and look forward to preparing for."
While it's obviously a rivalry game, Woodward said the Wolverines, who like Smyrna have clinched a playoff bid, haven't exactly done their part.
"It's always a big game, especially having Smyrna this late, and the region implications make it bigger," Woodward said. "It should be an exciting time for all the coaches and players.
"I kind of have a hard time calling it a rivalry because in a rivalry you're not supposed to know who is going to win. If you look back it's obvious who has been winning, but none of what has happened the past 30 some years matters. We just have to go out and try not to do too much."
Riverdale (6-2, 4-1) will be looking to bounce back from last week's loss to Oakland when it travels to Warren County (8-0, 5-0).
Warren County, which plays Oakland the final week of the season, has been the surprise team of Region 3. Riverdale can all but wrap up a No. 2 seed in the playoffs with a victory.
The Pioneers are led by standout C.J. Taylor, who has caused fits for every region defense this season.
"Warren County is 8-0 and we're competing with Warren for a home playoff game," Riverdale coach Will Kriesky said. "CJ Taylor is an excellent football player, but they're big and physical up front on both sides of the ball and they've got other good athletes. We just have to control what we can control. We have to get Riverdale better and get ready to play Warren County on Friday."
Blackman will be in a must-win situation when it plays at Siegel. The Blaze need wins this week at next against Cookeville to make the playoffs.
"We know we've got to win our last two games to get into the playoffs, but we have to worry about Siegel first," Blackman coach Kit Hartsfield said. "They're playing good defense and getting better. We're trying to get better every week and we need to this week."
In other games, Oakland will look to stay undefeated when its hosts Coffee County, Rockvale hosts Cookeville, Stewarts Creek travels to John Overton, MTCS is at Mt. Juliet Christian and Eagleville plays Mt. Pleasant at home.
THIS WEEK'S SCHEDULE
La Vergne at Smyrna
Riverdale at Warren County
Blackman at Siegel
Coffee County at Oakland
MTCS at Mt. Juliet Christian
Stewarts Creek at John Overton
Mt. Pleasant at Eagleville