Born in Fanano on 23 March 1998, Lenzini started out playing for her hometown club, before moving to Olimpia Vignola. She joined Brescia at a very young age in 2014, spending the 2014/15 season out on loan at Imolese. After returning to Brescia, she was part of the team that won the Scudetto, Coppa Italia and Italian Super Cup, leading to her making her debut in the UEFA Women’s Champions League. Lenzini joined Juventus in 2017 and was part of the side that won the first Scudetto title, before spending the next three seasons out on loan at Sassuolo. A defender, Lenzini can play at both centre-back and right-back. She returned to the club from her loan spell in the summer of 2021.