Juan José "Juanjo" Nieto Zarzoso (born 3 October 1994) is a Spanish footballer who plays for Slovenian PrvaLiga club Celje.
[2] He made his senior debut with Castellón's first team on 16 December 2012, starting in a 1–1 Tercera División home draw against CD Eldense.
[6] Nieto first appeared with the main squad on 22 January 2017, starting in a 1–1 Segunda División away draw against CF Reus Deportiu.
On 9 July 2021, free agent Nieto signed a two-year contract with UD Almería also in the second level.
On 25 November 2022, after recovering from injury, Nieto announced his departure from the Rojiblancos,[11] and signed a 18-month deal with SD Huesca in the second division.