In 2010, Bertolini became a member of the Italian National team and competed at the 2010 European Junior Championships in Bremen, she qualified in the Ball finals finishing in 6th place.

In 2014, Bertolini was invited for a monthlong technical training in Russia's famous Novogorsk Sport center for rhythmic gymnastics.

At the 2015 World Championships in Stuttgart, Bertolini qualified for her second all-around finals finishing in 23rd position and with Team Italy placing 14th in the overall standings.

On 17–20 March she then competed at the 2016 Lisboa World Cup where she finished 9th in the all-around ahead of Kazakh Sabina Ashirbayeva.

On 1–3 April she competed at the 2016 Pesaro World Cup where she finished 8th in the all-around (a PB: 70.900) and qualified to clubs final.

Bertolini competed at the quadrennial held 2017 World Games in Wrocław, Poland from 20 to 30 July, however she did not advance to any of the apparatus finals.