Sigfridsson was the Swedish skip at the 2002 Ford World Women's Curling Championship. Once again, she won a silver medal, and once again lost to Scotland (this time, skipped by Jackie Lockhart) in the final. The score was 6–5.
Sigfridsson returned to the World Championships in 2008, where she played lead for the Swedish team skipped by Stina Viktorsson that finished in sixth place. The following season, she temporarily joined the Anette Norberg rink as lead, and the team won a silver medal at the 2009 Mount Titlis World Women's Curling Championship, losing to China's Wang Bingyu in the final. Returning to the Viktorsson rink, Sigfridsson won a gold medal at the 2010 European Curling Championships as the lead on the team.
In 2011, Sigfridsson left the Viktorsson rink to form her own team as skip, but throwing lead rocks. The team quickly became the top team in Sweden, and would represent the country at the2011 European Curling Championships where they won a silver medal, losing to Scotland's Eve Muirhead rink. As Sweden's representative at the 2012 Ford World Women's Curling Championship, the Sigfridsson rink won the silver medal, losing to Switzerland's Mirjam Ott in the final match. The team would again represent Sweden at the 2012 European Curling Championships where they won the bronze medal.
Despite losing the 2013 Swedish final to Anette Norberg, the Sigfridsson rink was selected to represent Sweden at the 2013 World Women's Curling Championship. The team would again win a silver medal at the Worlds, losing to Scotland's Muirhead in the final. Sigfridsson and Muirhead would meet once again at the end of the season in the 2013 Players' Championship final, where she again lost to Muirhead. It would be the first time Sigfridsson would make the playoffs at at Grand Slam event.
In November 2013, Sigfridsson led Sweden to another gold medal at the 2013 European Curling Championships.
|Manitoba Liquor & Lotteries||Q||Q||Q||Q|
|F||Lost in Final|
|SF||Lost in Semifinal|
|QF||Lost in Quarterfinals|
|R16||Lost in the round of 16|
|Q||Did not advance to playoffs|
|DNP||Did not participate in event|
|N/A||Not a Grand Slam event that season|