2014–2018 Bartolini competed at the
2014 European Championships in the junior division. He helped Italy finish fifth as a team and individually he finished eighth in the all-around and on floor exercise and fifth on vault. Bartolini competed at the
2014 World Championships where he helped Italy finish 13th as a team during qualifications. He did not advance to any individual finals. Between 2015 and 2018 he competed at the
2015 European Games, the
2015 World Championships, and two
World Cups. In May 2016 Bartolini injured his shoulder and required immediate surgery.
2019–2021 Bartolini competed at the
2019 European Championships and finished eighth on floor exercise and sixth on vault. Later in the year he competed at the
2019 World Championships. The following month he underwent shoulder surgery for a second time. He competed at the
2021 European Championships where he won the bronze medal on floor exercise. In October he won the gold medal on floor exercise at the
2021 World Championships, becoming the first Italian to do so.
2022–2024 In August Bartolini competed at the
2022 European Championships, where he finished tenth in the all-around. Additionally, he qualified to the floor final in first place, and helped Italy qualify to the team final. During the team final he helped Italy win the silver medal behind Great Britain and he placed fourth on floor exercise. Bartolini next competed at the
World Championships where he helped Italy finish in fourth place. Individually he placed fifth on floor exercise. Bartolini next competed at the
2022 Swiss Cup alongside
Martina Maggio. They finished second behind the American duo of
Yul Moldauer and
Addison Fatta. Bartolini competed at the
2023 World Championships, helping Italy qualify to the team finals where they finished eighth. As a result, Italy qualified a full team to the
upcoming Olympic Games for the first time since
2012. At the 2024 Italian National Championships Bartolini only competed on four events but won the title on floor exercise. That same weekend he was selected to represent
Italy at the 2024 Olympic Games alongside
Yumin Abbadini,
Lorenzo Minh Casali,
Mario Macchiati, and
Carlo Macchini. At the
2024 Olympic Games Bartolini helped Italy qualify to the team final where they ultimately finished sixth. ==Competitive history==