Brady Tkachuk had two goals and two assists for the Ottawa Senators in a 6-2 preseason win against the Vancouver Canucks at Rogers Place on Wednesday.Ottawa scored six straight goals after falling behind 2-0 in the first period.Filip Chlapik scored at 17:32 of the second to give the Senators a 3-2 lead.Thomas Chabot and Connor Brown each had a goal and an assist, Artem Anisimov scored shorthanded, Mark Borowiecki had two assists, and Craig Anderson made 44 saves for Ottawa.Adam Gaudette and Sven Baertschi each had a goal and an assist, and Thatcher Demko allowed six goals on 29 shots for the Canucks.