At 14:25 of the second period in the Maple Leafs/Capitals game, Washington requested a Coach's Challenge to review whether Toronto was off-side prior to Kasperi Kapanen'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 Toronto Maple Leafs.
Since the Coach's Challenge did not result in the original call being overturned, the Washington Capitals forfeit their time-out.