The 2012 USA Curtis Cup competitor will be making her sixth U.S. Women's Open start and first since 2019. Duncan first qualified for the championship as a 18-year-old amateur in 2009 at Saucon Valley Country Club. Duncan's best season since turning professional in 2013 was 2018 when she amassed $534,860 to finish 42nd on the LPGA Tour money list. That season she finished runner-up in the Volunteers of America LPGA Texas Classic and tied for 15th in the KMPG Women's PGA Championship. Shortly after turning pro in 2013, the former Duke University standout tied for 15th at the U.S. Women's Open conducted at Sebonack Golf Club. Duncan won six college tournaments at Duke, was a four-time first-team All-American and was named the 2012 Player of the Year.