|Full name||Sergio Aguza Santiago|
|Date of birth||2 September 1992|
|Place of birth||Sant Boi de Llobregat, Spain|
|Height||1.75 m (5 ft 9 in)|
|2011–2013||Real Madrid C||57||(8)|
|2013–2015||Real Madrid B||44||(6)|
|2015–2016||Milton Keynes Dons||3||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 2 June 2018|
Born in Sant Boi de Llobregat, Barcelona, Catalonia, after playing youth football with EF Gavà and UD Cornellà, Aguza joined Real Madrid's youth facilities in 2008, aged 16. In 2011–12 season Aguza made his senior debut, playing for the C-team in the Tercera División.
On 8 September Aguza made his professional debut, starting in a 0–1 home loss against CD Mirandés. He scored his first goal on 15 February of the following year, netting his side's second in a 3–1 home success against FC Barcelona B.
Milton Keynes Dons
On 31 July 2015, Aguza signed for English Football League Championship side Milton Keynes Dons on a two-year deal. Aguza made his debut for the club on 11 August 2015 in the 2–1 Football League Cup win over Leyton Orient.
On 16 January 2016, following limited appearances for the club, Milton Keynes Dons announced that Aguza had left the club via mutual consent.
On 18 January 2016, Aguza signed a two-and-a-half-year contract with SD Ponferradina, returning to Spain and its second level. He scored his first goal for the club on 20 March, in a 2–1 home win against SD Huesca, and added two more match-winners against CD Lugo and Albacete Balompié; at the end of the campaign, he suffered team relegation.
Alcorcón / Córdoba
On 7 July 2016, Aguza signed a one-year deal with AD Alcorcón also in the second level. The following 31 January he rescinded his contract, and signed a six-month deal with fellow league team Córdoba CF just hours later.
- El Castilla, como un equipo de fútbol sala (Castilla, like an indoor football team); Marca, 11 July 2013 (in Spanish)
- El Mirandés se pone líder a costa de un filial que sigue sin puntuar (Mirándes becomes leader at the expense of a reserve team which remains without points); Marca, 8 September 2013 (in Spanish)
- La intensidad del Castilla desmonta el orden del Barça B (Castilla's intensity dismounts Barça B's order); Marca, 15 February 2014 (in Spanish)
- Sergio Aguza: MK Dons sign Real Madrid Castilla captain; BBC Sport, 31 July 2015
- MK Dons 2–1 Leyton Orient; BBC Sport, 11 August 2015
- Aguza departs; MK Dons, 16 January 2016
- Sergio Aguza, nuevo jugador de la SD Ponferradina (Sergio Aguza, new player of SD Ponferradina) Archived 2016-02-07 at the Wayback Machine; SD Ponferradina, 18 January 2016 (in Spanish)
- "Sergio Aguza, fichado" [Sergio Aguza, signed] (in Spanish). AD Alcorcón. 7 July 2016. Retrieved 7 July 2016.
- "Sergio Aguza rescinde su contrato con la A.D. Alcorcón" [Sergio Aguza rescinds his contract with A.D. Alcorcón] (in Spanish). AD Alcorcón. 31 January 2017. Retrieved 1 February 2017.
- "Aguza nuevo jugador del Córdoba C.F." [Aguza new player of Córdoba C.F.] (in Spanish). Córdoba CF. 31 January 2017. Retrieved 1 February 2017.
- "Sergio Aguza, un centrocampista de calidad y ofensivo para el Almería" [Sergio Aguza, a quality and offensive central midfielder for Almería] (in Spanish). UD Almería. 13 July 2018. Retrieved 15 July 2018.