Claim: Siv Gustavsson's team finished in first place in the 1975 IAAF World Race Walking Cup (unofficial) and also in the 1981 IAAF World Race Walking Cup.
Evidence: Siv Gustavsson (born 9 July 1957) is a Swedish former racewalking athlete. The 1975 IAAF World Race Walking Cup and 1977 IAAF World Race Walking Cup both featured invitational, non-official women's races and she showed herself to be among the world's best with a runner-up finish to fellow Swede Margareta Simu at the first race, then beating both Simu and Carol Tyson to win the 1977 race. She competed at the WAAA Championships in Britain in 1980 and was runner-up to Irene Bateman over 5000 m. Her career peaked at the 1981 IAAF World Race Walking Cup, where she became the second ever women's world champion in racewalking, defeating the whole field by nearly twenty seconds. She was the gold medallist at the 1981 IAAF World Race Walking Cup, making her the second ever female world champion in the sport.