Sidorova revelling in Jonkoping after superb second day
Japan's Tori Koana also had a perfect record on day two with two victories.
Russia's Team Anna Sidorova ousted home favourites Team Anna Hasselborg and Team Darcy Robertson of Canada to lead Group A on day two.
Winning skip Sidorova admitted her team needed "a much-needed boost" after day one and her team were awarded with just that.
The former European champions sealed a 8-5 victory over the Canadians in session five, before edging past the Olympic champions, Sweden, with Sidorova's last stone to seal a 5-4 success.
"We were waiting for this. We fought hard yesterday and it was really tough day for us," Sidorova revealed.
"A much-needed boost was required to get that feeling inside to tell us we can fight at the highest level.
"We want to be in the Grand Final in Beijing because it’s a great event and it would mean a lot to us."
Team Hasselborg did record a win, though, defeating China's Team Jiang Yilun earlier in the day 8-4, with a steal of two just before the fourth-end break the turning point.
The Chinese foursome did register a win themselves in day two's final session, getting the better of Canada's Team Darcy Robertson, winning 6-5.
It was a sensational day for Japan's Team Tori Koana, who registered two big wins over Scotland (6-3) and United States (8-5).
Koana, who skipped her rink to gold at the Japanese National Championships last year, told us: "Tonight we focused on ice conditions changing and we did well.
"We feel more pressure [after Team Satsuki Fujisawa's success in Omaha] but we are just focusing on doing our best."
It was mixed bag of fortunes for Korea's Team Minji Kim on day two, after the Omaha finalists were edged out by Team Cory Christensen of United States in the afternoon, losing 6-5.
But they returned to the ice in the evening in defiant fashion and responded immediately with a 7-2 triumph over Scotland's Team Sophie Jackson.