The Baltimore Ravens and Tennessee Titans were once division rivals in the AFC Central and have a long history which include memorable playoff battles. It’s also the first time the teams are meeting since the Titans stunned the top-seeded Ravens in the AFC Divisional Round back in January.

But things got heated between the two teams even before kickoff of their highly anticipated Week 11 clash, especially between Ravens head coach John Harbaugh and Titans cornerback Malcolm Butler, according to ESPN’s Jamison Hensley.

The incident began minutes before the game was about to start when Tennessee players gathered at the midfield logo of the M&T Bank Stadium, the Ravens’ home stadium. Baltimore players had not yet emerged from the tunnel when it happened. Butler then got into a shouting match against Harbaugh, who came closer to him and the Titans players until they had to be separated.

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Titans head coach Mike Vrabel then pulled his players to the sideline and then spoke to them before approaching and speaking to Harbaugh, who was still upset, until the two coaches were also separated by game officials.

The Athletic’s Jeff Zrebiec, meanwhile, reports that this wasn’t the first time that Tennessee players gathered on the Ravens’ midfield logo, which could be what caused Harbaugh to take offense.

The Ravens and Titans currently have identical 6-3 records and both need a victory to strengthen their playoff push in the AFC, and this incident will certainly add more spice to what is already an anticipated latest chapter in the rivalry between the teams.