The London Nationals have eliminated the St. Marys Lincolns from the playoffs after a close 4-3 victory in Game 5 on Wednesday.
Austin Kemp, Ethan Nother, Brenden Trottier and Max Vinogradov all scored once for London.
The Nationals won the first round playoff series 4-1.
London will now take on the Chatham Maroons in the Western Conference semi-finals. The schedule has not yet been announced.