Guillermo Balzi (born 23 July 2001) is an Argentine professional footballer who plays as an attacking midfielder for 2. Bundesliga club Holstein Kiel.
Career Balzi was born in in the province of Córdoba. A Newell's Old Boys youth product, he made his first-team debut in 2021. When he started in an Argentine Primera División match against San Lorenzo in March 2026, coach Mauricio Larriera's decision to include him was labelled a "surprise" by Argentine newspaper La Capital, with Balzi having previously made just two appearances in the Copa Argentina in that season. Balzi sustained a hip injury in the match, forcing his substitution by Brian Aguirre after 25 minutes.
Balzi spent two seasons on loan with Super League Greece club Levadiakos, scoring 9 goals and making 14 assists in 61 appearances. At the end of the loan, Levadiakos declined the option to sign Balzi permanently for a fee of €1.3 million for 70% of his economic rights. While Balzi's contract with Newell's Old Boys was valid until December 2027, he was not in coach Frank Kudelka's plans.
Balzi joined 2. Bundesliga side Holstein Kiel in July 2026, having signed a contract until June 2029. Holstein Kiel reportedly paid Newell's Old Boys €550,000 for 70% of his economic rights.
Style of play A creative midfielder, Balzi is left-footed.
Career statistics
+ Appearances and goals by club, season and competitionClubSeasonLeagueNational cupLeague cupContinentalOtherTotalDivisionAppsGoalsAppsGoalsAppsGoalsAppsGoalsAppsGoalsAppsGoalsNewell's Old Boys2021Argentine Primera División110000000–1102022Argentine Primera División181315000–2622023Argentine Primera División40107020–1402024Argentine Primera División10004000–50Total341411602000562Levadiakos (loan)2024–25Super League Greece19210––812832025–26Super League Greece21373––50336Total405830000131619Holstein Kiel2026–272. Bundesliga000000000000Career total7461241602013111711
References
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