Del Carretto learnt fencing at Club Scherma Rapallo under Roberto Cirillo. Her first international significant result was a team gold in the 2002 Junior European Championships in Conegliano. In 2003, she took a bronze medal in the individual event and a silver medal in the team event at the Junior European Championships in Porec. The same year, she earned a team bronze medal in the Senior European Championships in Bourges. In 2004, she came away with a silver medal in the Junior World Championships in Plovdiv after being defeated in the final by Romania's Ana Maria Brânză.