 TORONTO AP - Anthony Beauvillier scored twice, and the New York Islanders beat the Florida Panthers 5-1 to clinch an NHL best-of-five preliminary round playoff series in four games on Friday. Brock Nelson and Mathew Barzal had a goal and assist each in a game the Islanders never trailed. Defenseman Ryan Pulock made a diving stick save to prevent Floridas Aleksander Barkov from scoring into an open side to maintain New Yorks 3-1 lead midway through the second period. Semyon Varlamov stopped 24 shots, Jean-Gabriel Pageau scored an empty-netter, and the Eastern Conferences seventh-seeded Islanders bounced back from a 3-2 loss in Game 3 on Wednesday. New York will open the best-of-seven first-round series against a yet to be determined opponent next week. Mike Hoffman scored his Florida-leading third goal and fifth point of the series, while Sergei Bobrovsky proved inconsistent in stopping 33 shots. The 10th-seeded Panthers wound up one-and-done for their fifth consecutive postseason appearance, and eliminated for the second straight time by the Islanders. New York needed six games to eliminate the Panthers in a best-of-seven first-round series in 2016. Florida hasnt won a playoff series since making its first postseason appearance in 1996, when the team reached the Stanley Cup Final only to be swept by Colorado. The Islanders are making their second consecutive playoff appearance in two years under coach Barry Trotz, and only sixth since the 2004-05 NHL lockout. New York swept Pittsburgh in the first round last year before being swept by Carolina in the second. The Islanders caught the Panthers napping in building a 2-0 lead on Beauvilliers two goals by the 15:10 mark of the first period. New Yorks 2015 first-round draft pick opened the scoring 11:33... 