Castrovilli is a talented and versatile offensive–minded midfielder, with an eye for goal, who is capable of playing as an attacking midfielder or as an offensive–minded central midfielder, known as the mezzala role in Italian football jargon; he has also been deployed as a left winger, a position which allows him to cut onto his stronger right foot and shoot on goal. A fast, elegant, and dynamic player, despite not having a particularly low centre of gravity, he is capable of changing direction quickly, and is also known for his technique, dribbling skills, and use of feints, as well as his ability to exploit spaces and create a numerical advantage for his team when attacking with his late runs from deep. Due to his vision and intelligence, he is often involved in the build-up of attacking plays, although he is also known for his defensive work-rate, tackling, and ability to cover ground. Following an injury to Lorenzo Pellegrini, Castrovilli was called-up in June 2021 by Mancini for Italy’s UEFA Euro 2020 squad. He made his first and only appearance of the tournament in Italy’s final group match, a 1–0 victory against Wales in Rome on 20 June, coming on as a late second-half substitute for Matteo Pessina; the result allowed them to top their group. On 11 July, Castrovilli won the European Championship with Italy following a 3–2 penalty shoot-out victory over England at Wembley Stadium in the final, after a 1–1 draw in extra-time.