Reigning national and world champion Charley Thomas is the lone skip yet to lose at the Canadian junior curling championships in St. Catharines, Ont.

Thomas, representing Alberta, improved to 6-0 by defeating Ontario's Ryan Myler 10-4 in Monday's ninth draw at Jack Gatecliff Arena.

Thomas opened with a deuce and stole one in the second to lead 3-0.

The Calgary skip took a 4-1 advantage heading into the fifth, only to watch Myler draw for three to tie it 4-4.

In the sixth, Myler missed a double takeout in the sixth and Thomas drew for two to make it 6-4.

Then, in the seventh, Myler sailed his rock through the house on another takeout attemptto concede four — andthe game.

"We just misjudged it a couple of times, misread it and threw bad shots," he said. "We will do all right. We'll bounce back."

Thomas sits atop the men's standings followed by four rinks at 5-1: Mark Harnden of Northern Ontario, Myler, Brett Gallant of P.E.I., and Ghyslain Richard of Quebec.

"We're happy with 5-1," Myler said. "We expect to get a couple of losses, we want to be realistic."

British Columbia's Bryan Kedziora and Andrew Irving from Manitoba remain in contention at 3-3.

Steve Burgess of New Brunswick, Saskatchewan's Craig Ochilwa and Thomas Scoffin of the Yukon trail at 1-5, while Newfoundland and Labrador's Ryan Whithycombe and Colin Miller of the Northwest Territories remain winless at 0-6.

Four-way tie for first

In women's action, there is a four-way tie for first place with Kalynn Park of Alberta, Calleen Neufeld from Manitoba, Stacie Devereaux of Newfoundland and Labrador and P.E.I.'s Erin Carmody, all at 5-1.

Carmody, of Summerside, knocked off Neufeld 8-4 in Monday's evening draw, stealing two in the seventh and scoring four in the ninth to clinch the win.

Day Silvertson of B.C. stands at 4-2 followed by Mary Jane McGuire of New Brunswick, Tracy Horgan of Northern Ontario, Hollie Nicol of Ontario and Saskatchewan's Hailey Surik are 3-3.

Marie Christianson of Nova Scotia is well back at 2-4, as is Quebec's Alanna Routledge at 1-5.

Megan Cormier, from the Northwest Territories, and Sarah Koltun of the Yukon are 0-6.

Round robin play continues until Thursday, with tiebreakers and semifinals set for Friday at Jack Gatecliff Arena.

CBC-TV Sports will broadcast the men's final (Saturday, 1:30 p.m. ET) and the women's final (Sunday, 12:30 p.m. ET).

Both championship finals will be played at the St. Catharines Golf and Country Club.

With files from the Canadian Press