Pietrobelli akamiririra Argentina pamitambo yeOlympic yeZhizha ya2008 muBeijing, kwaakakwikwidza mumutambo wevarume wekukanda pfumo
. Akaisa makumi matatu nemana pakupedzisira mumakwikwi ekufanirwa, aine 69.09 metres, akakundikana kuenda kumagumo.