Sergio González Testón (born 26 May 1995), commonly known as Sergi, is a Spanish footballer who plays for San Sebastián de los Reyes as a left back.
He made his senior debut with the C-team on 7 September 2014, starting in a 5–1 Tercera División home routing of AD Colmenar Viejo.
He made his first team debut on 25 October 2017, starting in a 1–1 away draw against Elche CF, for the season's Copa del Rey.
[5] Sergi then returned to Spain with Deportivo Alavés, who loaned him to NK Istra 1961, their partner club in the Croatian Football League.
After two years with the Pula-based club – including playing in their 6–3 defeat to GNK Dinamo Zagreb in the 2021 cup final[6] – he joined UD San Sebastián de los Reyes in the Primera División RFEF in January 2022.