Falcons offensive coordinator Steve Sarkisian took umbrage with the notion that the team could have easily flooded a zone against the Eagles to score in the red zone.

» More: Sarkisian stands behind red-zone plan

Former NFL quarterback Kurt Warner, a NFL Network analyst and member of the Pro Football Hall of Fame, questioned Sarkisian's calls immediately after the 18-12 opening day loss to the Eagles.

“It was bracket coverage,” Sarkisian said. “They were doubling No. 3 on the right-hand side and No. 2 on the left-hand side. It wasn’t a zone defense. I’m sorry Kurt Warner, Coach.”

» Also: Matt Ryan says offense needs balance

After seeing Sarkisan’s retort, Warner appeared to back track in a couple of tweets.