Stefanie Lawton can now count the defending champions among her victims at the Capital One Canada Cup curling competition.
The Saskatoon skip improved to 4-0 Wednesday with a 7-5 win over Team Jones in Draw 5 action.
Trailing 3-2 after Kaitlyn Lawes and her Winnipeg rink put up a deuce in the fourth end, Lawton came back with two in the sixth and two in the eighth before capping the victory with a point in the 10th.
It was Lawton's second close win of the day.
Earlier, she needed an extra end to defeat Winnipeg's Chelsea Carey 6-5.
Lawton's early success in Moose Jaw is moving her closer to a possible Olympic berth. The winner of both the men's and women's tournaments will receive one of the six automatic qualification spots for the 2013 Roar of the Rings - the tournament that will determine who advances to the 2014 Winter Games in Sochi.
Team Jones, which is tied for second place at 2-1, is being skipped by Lawes in place of Jennifer Jones, who gave birth to a baby girl two weeks ago. Jones is also recovering from knee surgery.
Also in Draw 4, Sherry Middaugh of Coldwater, Ont., scored two in the 10th end for an 8-7 win over Calgary's Crystal Webster. Both teams are 2-2.
In men's action, Jeff Stoughton grabbed a share of first place with a 10-4 win over Olympic champion Kevin Martin. Stoughton had two steals of three in the game as he moved into a tie with fellow Winnipeg native Mike McEwen.
Edmonton's Martin, the defending Canada Cup champion, is struggling early at the tournament.
He curled just 57 per cent against Stoughton as his rink fell to 1-2.
In the other men's game, Glenn Howard of Coldwater, Ont., earned his first win of the tournament with a 10-4 rout of John Epping of Peterborough, Ont. Howard scored three in the opening end and added another four in the seventh and final frame to improve to 1-2.
Epping, who opened his tournament with an upset win over Martin, fell to 1-3.
