Marner had a goal and two assists as the Leafs dumped the Ottawa Senators 6-2 to take Game 1 of their opening-round series — the first playoff Battle of Ontario in more than two decades.

Max Domi scored at 3:09 of overtime as the Toronto Maple Leafs survived a blown 2-0 lead to defeat the Ottawa Senators 3-2 and go up 2-0 in their first-round playoff series Tuesday night. The winger moved into the offensive zone in the extra period and ripped his first of the post-season upstairs past Linus Ullmark.

The Toronto Maple Leafs headed into Game 2 of the Battle of Ontario with a convincing 6–2 win against the Ottawa Senators in Game 1. The Core Four had an outstanding night, scoring four goals and tallying six assists for 10 points.