William Nylander scored twice in the first period before adding an assist as Toronto built a big lead before holding on to beat the Florida Panthers 5-4 in the opener of the second-round series.

Both teams rolled through their first-round matchups — top-seeded Toronto advanced after dispatching the No. 4 Ottawa Senators in six games, while the third-seeded Panthers made quick work of the No. 2 Tampa Bay Lightning, winning the series 4-1.