Ottawa's Rachel Homan remained perfect at the Ontario Scotties with a narrow 8-7 victory over Mississauga's Jacqueline Harrison in the fifth draw.
Earlier in the day, Homan topped Mallory Kean 8-3 in eight ends.
Harrison, Sherry Middaugh, Cathy Auld and Julie Hastings are all at 3-2 for the tournament.
Draw 6 begins today at 1:00 p.m.