Ferretti started playing volleyball at
Giovolley Reggio Emilia youth teams and at the age of fourteen made her debut for the first team in the Serie B2. In 2000, she moved to
Club Italia and became involved in the
Italian national youth teams between 2000 and 2001, finishing second at the 2000
Women's Junior European Volleyball Championship and winning the 2001
Girls' Youth European Volleyball Championship. After one season at Club Italia, she moved to
Despar Colussi Perugia and made her debut in the
Serie A1 in 2001. winning the 2002–03 Serie A2 championship (and promotion to Serie A1) and reaching the finals of the Serie A2 Italian Cup with the club. On 28 May 2003, she made her debut for the senior
Italian national team in a 3–2 victory against
Cuba played in
Ancona. A few months later she signed with
Volley Modena, coached by
Giovanni Guidetti, ahead of the 2003–04 season. She reached the Serie A1 playoffs semifinals during that first season at the club. Following her good performances, she was called to the national team and was part of the 2004 campaign, which included a gold medal at the
Montreux Volley Masters, a silver medal at the
World Grand Prix and a fifth-place finish at the
Olympic Games in Athens. Her second season at Volley Modena was very different, the club struggled and at the end of the 2004–05 season was relegated to the Serie A2. With the national team she won a bronze medal at the 2005 Montreux Volley Masters and a silver medal at the
2005 FIVB Volleyball World Grand Prix. Further exams confirmed she suffered an
anterior cruciate ligament injury and on 30 November 2005, she had a successful
surgery which included the
anterior cruciate ligament reconstruction and
medial meniscus replacement of her right knee. She spent 8 months recovering and missed the remaining of the 2005–06 season. Back for the 2006–07 season, her club performances helped BigMat Chieri finish sixth and reach the Serie A1 playoffs. She developed technically and alongside her teammates became a strong and very competitive team. In her first season at the club (2007–08), she won the
CEV Cup, reached the final of the Italian Cup, and won the Serie A1 title. She then joined the national team to finish third at the
2008 FIVB Volleyball World Grand Prix and fifth at the
Olympic Games in Beijing. In 2009–10, she won her second consecutive Italian Supercup, reached the semifinals of the Italian Cup and won her third consecutive Serie A1. She won the Italian Supercup for a third consecutive year in 2010 and finished fourth at the
2010–11 Champions League. In May 2012 she signed with
Rebecchi Nordmeccanica Piacenza. The 2013–14 season, her second at the club, was also very successful as she won the treble (Supercup, Cup and Serie A1). That meant she had won 13 domestic titles (five Serie A1, four Cups and four Supercups) in the last 7 seasons. In May 2014, she agreed on a year contract to play for
Rabita Baku of the
Azerbaijani Super League. On 16 August 2014, while playing for the national team at the
2014 FIVB Volleyball World Grand Prix match against
Germany, she had a right knee injury. On 19 August 2014, she had a successful surgery to remove
meniscus damaged fragments on her right knee. She recovered in time to play the
2014 World Championship, which Italy was fourth place after losing 2-3 to Brazil in the bronze medal match. In the 2014–15 season, her new club, Rabita Baku was competing in the
Super League and the
Champions League. Ferretti started the season in both competitions, but a Champions League group stage defeat to
Chemik Police which eliminated the club from the tournament in late January 2015, lead to uncertainty at the club due to its finances and on 5 February 2015 her contract with the club was terminated by mutual agreement. In late February 2015, she signed with
Liu Jo Modena for the remaining of the 2014–15 season and made her debut for the club in the semifinal of the Italian Cup on 28 February 2015. She reached the Italian Cup final, but the club was defeated by
Igor Gorgonzola Novara. She signed a two-year contract to remain at the club before the start of the 2015–16 season. On 19 May 2016, when Liu Jo Modena ceased its volleyball activities and joined Nordmeccanica Piacenza, she became a
Liu Jo Nordmeccanica Modena player. ==Personal life==