At 19:44 of the first period in the Blackhawks/Penguins game, Pittsburgh requested a Coach's Challenge to review whether Chicago was off-side prior to Marian Hossa's goal.
After NHL Hockey Operations staff reviewed all available replays and consulted with the linesmen, the call on the ice was upheld -good goal Chicago Blackhawks.

Since the Coach's Challenge did not result in the original call being overturned, the Pittsburgh Penguins forfeit their time-out.