Juuse Saros made 31 saves in a 4-1 victory for the Nashville Predators, spoiling the Ottawa Senators' home opener.
Ryan O'Reilly's third-period goal held up as the winner, making it 2-0 with 5:22 remaining in regulation.
Marchessault opened the scoring at 12:11 of the second period, tucking the puck five-hole on Ullmark, who stopped 22 shots, to capitalize on a turnover inside the blue line.
Author's summary: Predators win 4-1 against Senators.