At 10:17 of the third period in the Sabres/Predators game, Buffalo requested a Coach's Challenge to review whether Nashville was off-side prior to James Neal's goal.
After reviewing all available replays and consulting with the Linesman, NHL Hockey Operations staff determined that the Predators entered the attacking zone legally prior to the goal.

Therefore the original call stands - good goal Nashville Predators.
Since the Coach's Challenge did not result in the original call being overturned, the Buffalo Sabres forfeit their time-out.