Silvana Tirinzoni's Switzerland have qualified for the playoffs ©WCF/Steve Seixeiro

Silvana Tirinzoni's Switzerland and Anna Hasselborg's Sweden confirmed their countries' spots at the Beijing 2022 Winter Olympics as well as the World Women's Curling Championship playoffs on day seven of competition at the WinSport Arena in Calgary.

Both teams joined the Russian Curling Federation (RCF) rink, skipped by Alina Kovaleva, in the playoffs - with the rest of the round-robin matches set for tomorrow.

Switzerland defeated RCF in the early session 8-6 to secure advancement, putting the reigning world champions top of the standings.

Later, against Tabitha Peterson's United States. Tirinzoni's side scored a winner with the hammer in the 10th end, triumphing 6-5.

Olympic champions Sweden secured their spot in the playoffs with a 6-1 win over Daniela Jentsch's Germany, but later went down 8-6 to Kim Eun-jung's South Korea.

South Korea put themselves back into top-six contention with a 7-1 win over Han Yang's China.

Despite their early defeat to Switzerland, RCF claimed another victory by scoring two in the final end against Eve Muirhead's Scotland to win 9-8.

The final three spots in the playoffs are still open to seven nations.

Madeleine Dupont's Denmark continued their run in the top six with a 9-6 win over Marie Turmann's Estonia, important after having lost 10-8 earlier to Kerri Einarson's Canada.

Einarson's side then lost 7-5 to Sayaka Yoshimura's Japan, putting another dent in the hosts chances of progressing to the playoffs.

Japan claimed two victories on day seven - the other being an 8-2 win over Stefania Constantini's Italy.

China remain in contention too after a 6-4 win over Italy.

Crucial matches on the final day of the round-robin stage include Scotland versus Denmark and China versus Canada.