At 12:23 of the second period in the Red Wings/Flames game, Detroit requested a Coach's Challenge to review whether Matthew Tkachuk interfered with Red Wings goaltender Petr Mrazek prior to his goal.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed that no goaltender interference infractions occurred.
Coach's Challenge: DET @ CGY - 12:23 of Second Period
Original call stands - good goal Calgary Flames