In 2011, he became an assistant coach of Andrea Anastasi in the Polish national volleyball team. On 10 July 2011, they led Poland to a bronze medal of the 2011 World League, the nation's first ever World League medal. On 18 September 2011, Poland, led by Anastasi and Gardini, won a bronze medal of the 2011 European Championship. In the same year, their team achieved a silver medal of the 2011 World Cup and was qualified for the Olympic Games London 2012. For the first time in its history, the Polish national team won three medals in one year. On 8 July 2012, Poland won the final match of the 2012 World League against United States (3–0). In October 2013, Anastasi and Gardini were dismissed as coaches of the Polish national team.