NASHVILLE--Football was a game of yards, not inches or feet for the Colts on their national stage on Monday Night Football.

Now its a season of games. A quartet to be exact.

Two failed fourth down conversion tries translated into 10 Tennessee Titan points, breaking open a scoreless tie while sending the Colts to a 31-21 loss at LP Stadium.

The loss puts the five-time AFC South champions four games behind their rivals in Nashville, who remain the NFL's only undefeated team at 7-0.

"We didn't have that many possessions in the second half," said Colts quarterback Peyton Manning, whose team fell to 3-4 after the loss. "Those two fourth down conversions, that kinda ended up being the difference in the game."

The first of which was just a yard around midfield with the score tied at 14 early in the late in the third quarter. Dominic Rhodes' attempt to run off tackle was immediately snuffed out by Stephen Tullock, giving the ball back to Titans

But even after Rob Bironas' 48 yard field goal gave the Titans their first lead of the game the Colts drove quickly to the Tennessee 34. There the Colts elected to go for it on fourth-and-two, this time failing when Peyton Manning's pass for Marvin Harrison was batted away by Nick Harper.

LenDale White's second TD of the game following the drive put the game away for the Titans, who are in prime position to win their first AFC South title since 2002.

"It's going to make it doubtful for us to win the division," head coach Tony Dungy admitted after the game. "We'll just have to see what the last nine games bring."