NASHVILLE, Tenn. -- Tennessee Titans defensive backs had their worst game of the season last Sunday against the Jacksonville Jaguars.

It was their good fortune that it didn't lose the game for them, as Marcus Mariota and the offense did great work to offset it and get the Titans their third win of the season.

Veteran Perrish Cox has been the Titans' best cover corner by a good deal for most of the year. But Cox rated Sunday as "one of my terrible, terrible games."

"It was just me out there, trying to guess the route instead of playing the receiver," he said. "I was trying to make a play and obviously that sucker went the other way on me. It was just me not reading my keys right and trying to do something that I normally wouldn't do.

"It'll be a whole different game this week. It was more of, I'm going to say, a reality check. Everything doesn't always work the way you plan it to. Just stick to what you know best, do what you do best. That's not what I did that game."

In general as the Titans have struggled on third down over the last five weeks, the coverage has been less sticky. Blidi Wreh-Wilson's play as the nickel against the Jaguars landed him on the bench after just six snaps in favor of B.W. Webb.

On Sunday, the group will be asked to slow some productive, big and fast receivers in Brandon Marshall and Eric Decker. The New York Jets don't throw to a tight end, so help from big safeties and linebackers won't be as effective as it has been against other teams.

"Our biggest problem right now, we're not getting really separated on, we're always at the ball, if you notice and look back through these recent games, we're not making a play at the ball," Titans assistant head coach/defense Dick Lebeau said. "That's not one person at all, that's the secondary.

"You've got to get that long pass knocked down or intercepted. I mean they're going to catch some, but you can't let them catch a high percentage or you're going to have problems."