Tabitha Peterson (Chaska, USA) won 9-5 over Anna Hasselborg (Sundbyberg, SWE) in the Bronze Medal game at the 2021 LGT World Women's Curling Championship in Calgary, Alberta. of the 2021 LGT World Women's Curling Championship in Calgary, Alberta; Tabitha Peterson (Chaska, USA) won 9-5 over Anna Hasselborg (Sundbyberg, SWE) in the Bronze Medal game at the 2021 LGT World Women's Curling Championship in Calgary, Alberta. Peterson lost 7-3 to Silvana Tirinzoni (Aarau, SUI) in the semifinals to drop into the third place game. of the 2021 LGT World Women's Curling Championship in Calgary, Alberta; and won 8-7 over Madeleine Dupont (Hvidovre, DEN) in the quarterfinals. of the 2021 LGT World Women's Curling Championship in Calgary, Alberta;
 
Peterson finished 7-6 in the 0-team qualifying round. . In their opening game, Peterson lost 10-6 to Eve Muirhead (Stirling, SCO), droppimg another game, 8-7 to Daniela Jentsch (Fuessen, GER) where Peterson responded with a 11-5 win over EunJung Kim (Gangneung, KOR). Peterson won 7-5 against Stefania Constantini (Trentino, ITA), then won 7-6 against Kerri Einarson (Gimli, CAN) and 5-3 against Marie Turmann (Tallinn, EST). Peterson went on to lose 7-6 against Dupont. Peterson responded with a 8-7 win over Sayaka Yoshimura (Sapporo, JPN). Peterson won 6-3 against Yu Han (Beijing, CHN). Peterson went on to lose 10-4 against Hasselborg. Peterson responded with a 11-3 win over Anna Kubeskova (Prague, CZE). Peterson went on to lose 6-5 against Tirinzoni. Peterson lost 7-3 to Alina Kovaleva (St. Petersburg, RCF) in their final qualifying round match.
 
Peterson ranks 136th overall on the Year-to-Date rankings with 0.000 points earned so far this season.