Bennett checked Coleman into the boards from behind in the third period of Sunday's 5-4 Lightning win.
Bennett was handed a minor penalty for charging, and Tampa Bay's Brayden Point converted on the ensuing power play before scoring the winning goal late in regulation.
Bennett struggled for most of the season with the Calgary Flames before they traded him to Florida on April 12. The 24-year-old clicked immediately with his new club, collecting three goals and two assists in his first three games with the Panthers. He recorded six markers and nine helpers in 10 regular-season contests with Florida.
Game 2 is scheduled for Tuesday night.