[3] After playing for Doncaster Rovers Belles Juniors, she moved to Sheffield United Girls’ Centre of Excellence, where she broke into the England under-17 squad.

[2] In August, she suffered a cruciate knee ligament injury, missing the rest of the season, as the team were relegated to FA WSL 2, as well as the subsequent Spring Series.

[14][15] In July 2018, Sigsworth was announced as part of the inaugural Manchester United squad that was set to compete in the newly restructured FA Women's Championship.

[19] Sigsworth finished the season with consecutive Championship titles and golden boot awards, having scored 17 league goals.

[20][21] Sigsworth scored her first goal of the 2019–20 season in United's 2–0 League Cup win against Manchester City on 20 October 2019.

"[26] With a decrease in playing time for a second successive season, limited to 577 minutes in 14 league appearances, it was announced on 21 June 2021 that Sigsworth would leave United on the expiry of her contract at the end of the month.

[33] In August 2013, Sigsworth was part of the England under-19 team who finished as runners-up to France at the UEFA Women's Under-19 Championship in Wales.

[35] Sigsworth started all three games as England failed to progress, having finished third in Group C.[36] Doncaster Rovers Belles Manchester United Individual