It's no secret what ails thee New Orleans Saints defense. They just gave up 1,000 yards in the space of a week between a Monday night game with the Kansas City Chiefs and a blowout loss to the Tampa Bay Buccaneers the following Sunday, and head coach Dennis Allen didn't hesitate to point to the source of their problems.

"We didn't tackle," Allen said matter-of-factly after the Bucs game. "When you don't tackle you give up explosive plays and you give up plays, and it kind of snowballed on us a little bit. It was not good enough."

Those missed tackles were Allen's first takeaway from the game. He said strong defense has been something the team has leaned on, but that wasn't the case Sunday: "That's on me. I've got to do a better job with our guys. I've got to make sure we understand what we're doing, we've got to do more tackling drills, whatever the case may be. It was not a good defensive performance at all."

Allen has been the architect of the defense for nearly a decade, having drafted, developed, and recruited many of the players on the field. To see that unit's fundamentals collapse was a gut punch, especially after he and his staff had made tackling drills a point of emphasis at practice during the week. So what's causing all these missed tackles from normally sure-handed players like Demario Davis and Paulson Adebo?

"Part of it's angles, it's technique, it's wrapping up. A lot of fundamental things that we're not good enough with the tackling. And I think it starts with leverage and angles. That's where it starts, and then the fundamental of actually making a tackle. Got to do a better job of wrapping up. But that's two weeks in a row we haven't done a good job tackling, and that's our biggest concern," Allen said.

It's a major problem and it's only gotten worse. And the Saints don't have time on their side. They kick off with the Denver Broncos on Thursday night. When asked if these missed tackles are something the team can clean  up in  just four days, Allen's response was succinct.

"It's something we'd better fix in four days," Allen said gravelly. It might be overdramatic to say his job is on the line if it doesn't get better, but this is how those situations develop. If he can't get his team playing fundamental football, he won't be their coach for much longer.

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This article originally appeared on Saints Wire: Dennis Allen says Saints will try everything to stop missing tackles