Jonathan "Johnny" Rossini[2] (born 5 April 1989) is a Swiss former professional footballer who played as a centre back.

[5] In June 2010, along with Tissone, Rossini's co-ownership deal with Udinese was extended and he was loaned back to Sampdoria,[6] however he did not make an immediate first-team appearance for them.

After promotion to Serie A, under new manager Ciro Ferrara, Rossini was first-choice centre-back alongside captain Daniele Gastaldello at the heart of the defence.

On 20 June – 1 July 2013, Sassuolo, newly promoted to Serie A, purchased the 50% ownership rights to Rossini held by Udinese for €1.5 million, via Sampdoria.

On 1 July 2013, Rossini joined Sassuolo on another co-ownership deal[11] and appeared in six league matches for the first part of the 2013–14 season.

However, Sassuolo later signed centre-backs Lorenzo Ariaudo and Paolo Cannavaro during the 2014 January transfer window, limiting Rossini's first-team appearances.

[12][13] Rossini mainly found himself used as the backup at centre-back to Italian international Gabriel Paletta and club captain Alessandro Lucarelli.

[15] However, on 13 July, Leeds opted to abandon the deal due to concerns of Rossini's lack of fitness, and the player returned to Sassuolo.