Daiane's breakthrough came at the 2003 World Artistic Gymnastics Championships in Anaheim, California. There, she won the gold medal on floor exercise, defeating Romania's Cătălina Ponor, who would become the Olympic champion on the event the following year. She opened her routine with a piked double Arabian: a half twist into a double front flip in a piked position. Because she was the first to perform the skill in World Championships or Olympic competition, it was named after her in the Code of Points.