Rachel Homan and Brad Jacobs are still perfect at the Rogers Masters Grand Slam of Curling in Brantford, Ont.
Ottawa's Homan improved to 5-0 on Friday after beating Calgary's Shannon Kleibrink 7-2 and Sherry Middaugh of Coldwater, Ont., 6-2 in the early draw.
Jacobs meanwhile continues to top the men's round robin. The Sault Ste. Marie, Ont., rink moved to 5-0 after beating Toronto's Mark Kean 7-2 in their lone draw of the day.
Switzerland's Silvana Tirinzoni and Winnipeg's Chelsea Carey also moved atop their pools in women's play. Tirinzoni (4-1) went into first after defeating Winnipeg's Kaitlyn Lawes 7-4.
In the late draw, Carey cruised past Kelly Scott of Kelowna, B.C., 8-2 to improve to 4-1.
The day was a setback for Lawes, who entered day 3-0 but lost both of her matches starting with a 7-3 setback to Calgary's Crystal Webster.
Lawes is heading Jones's team after the world champion gave birth to a baby girl on Tuesday.
On the men's side, Calgary's Kevin Koe defeated Glenn Howard of Coldwater, Ont., 4-3 in the only match of the late draw.
The win lifted Koe atop his pool at 4-1. Edmonton's Kevin Martin (4-1) has the lead in his pool after hammering Denmark's Rasmus Stjerne 7-2.