Díaz ranked number one in a list of the most expensive players in Paraguayan football for 2015 published by Diario Extra.[1]
Club career
Youth and early career
Díaz played at Club Tacuary School of Football for 1 year, before moving to Cerro Porteño.[2] Díaz arrives at Cerro Porteño aged 10, at the club's school of football.[3] He scored approximately 30 goals in the Cerro Porteño U15 team and was then moved to the reserves team. He was coached by Diego Gavilán in the U15 team.[4] In 2013, he was referred to as the Sergio Aguero of Cerro Porteño as the reserves joined in on a practice session with the first-team.[5]
Cerro Porteño
2014 season
Diaz debuted as a 15-year-old in the Primera División Paraguaya, on 27 June 2014, in a 2–1 home victory against Club General Díaz. He entered the field in the 84th minute for Guillermo Beltrán.[6] Díaz then scored against Nacional Asunción in September, handing Cerro Porteño the victory.[7] The player scored a double in a 2–0 home victory against 3 de Febrero on 8 October 2014.[8] Against Boca Juniors in the Copa Sudamericana, Diaz wore the #22 jersey.[9]
In Diaz's debut for Cerro Porteño in the 2015 Primera División Paraguaya season, he scored one goal in his side's 3–0 away victory against Sportivo Luqueño on 14 February 2015.[11] He signed his first professional contract after turning 18 years old and renewed his contract with Club Cerro Porteño until 2021.
Real Madrid
Sergio Diaz is the second Paraguayan to play in Real Madrid preceding Javier Acuña.
He played with Real Madrid B at the beginning of the 2016 season.[12]
On 10 August 2017, Díaz was loaned to Segunda División club CD Lugo for one year.[14] He suffered a knee injury on 16 November 2017, which kept him out for the rest of the season.[15]
Loan to Corinthians
A year later, on 30 July 2018, he was loaned to Brazilian club Corinthians, for one and a half-year.[16]