At 9:55 of the third period in the Maple Leafs/Sabres game, Toronto requested a Coach's Challenge to review whether Buffalo's Johan Larsson interfered with Toronto goaltender Frederik Andersen prior to his goal.

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed no goaltender interference infractions occurred before the puck crossed the goal line.
Therefore the original call stands - good goal Buffalo Sabres.
Since the Coach's Challenge did not result in the original call being overturned, the Toronto Maple Leafs forfeit their time-out.