Leonardo Julián Balerdi Rosa (born 26 January 1999) is an Argentine professional footballer who plays as a centre-back for Ligue 1 club Marseille and the Argentina national team.

[3] Balerdi made his debut for Boca Juniors in the Argentine Primera División starting against Club Atlético Huracán on 27 August 2018.

[4] Although only appearing 5 times for Boca Juniors (a total of 450 minutes on the pitch[5]), Balerdi's performances took Argentinian football by storm and he has rapidly been hailed[by whom?]

[7][8] Balerdi made his Dortmund and Bundesliga debut on 7 December 2019 against Fortuna Düsseldorf coming onto the pitch as a substitute in the 78th minute.

[13][better source needed] He debuted for the Argentine senior squad on 10 September 2019 in a friendly match against Mexico, replacing Lucas Martínez Quarta in the 83rd minute.