In 2010, Petrini had her national and her international breakthrough. In 2011, Petrini also takes part in the prestigious French Club Championship Series Lyonnaise des Eaux and represents the club SASTRI 37 (Saint Avertin Sports). At the opening triathlon in Nice (24 April 2011), Petrini placed 21st and thus proved to be the second best triathlete of her club
Petrini lives in Rome and trains at the Olympic high performance centre Acquacetosa.
Her coaches are Alessandro Bottoni and Piergiorgio Conti. The following list is based upon the official International Telecommunication Union rankings and the International Telecommunication Union Athletes"s Profile Page.
Unless indicated otherwise, the following events are triathlons (Olympic Distance) and refer to the Elite category.