MONTREAL (AP) — Elena Rybakina of Kazakhstan outlasted Daria Kasatkina of Russia 5-7, 7-5, 7-6 (8) in a National Bank Open quarterfinal that ended Saturday at 2:54 a.m. With a few hundred hardy fans left, Rybakina finally finished off Kasatkina with an overhand smash on her fifth match point. Rybakina also fended off a match point with an ace …