|Full name||Sergio Aragoneses Almeida|
|Date of birth||1 February 1977|
|Place of birth||O Porriño, Spain|
|Height||1.82 m (6 ft 0 in)|
|2005||→ Getafe (loan)||11||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 13 December 2015.
His professional career, mainly associated with Tenerife, saw him appear in 180 Segunda División games over the course of nine seasons. He added 87 matches in La Liga, also representing in the competition Atlético Madrid and Getafe.
Aragoneses was born in O Porriño, Galicia. After unsuccessfully emerging through Celta de Vigo's youth ranks he went on to represent local Sporting Guardés and Pontevedra CF, moving to CD Tenerife for the 2000–01 season and helping the Canary Islands club return to La Liga immediately.
Aragoneses made his top flight debuts in 2001–02 (in a 0–2 home loss against Deportivo Alavés), and went on to have unassuming spells with Madrid's Getafe CF and Atlético, which loaned him to Getafe as well. In 2005–06 he signed for second division side Elche CF, being diagnosed with testicular cancer shortly after; he missed a great part of the campaign, but was still able to finish it.
After joining Hércules CF – also in the Valencian Community and in the second level – in 2006, Aragoneses was again diagnosed with the ailment, this time being forced to undergo chemotherapy. He eventually recovered completely, and returned to the team's lineups.
In early 2008, Aragoneses was suspended by coach Andoni Goikoetxea after statements by the player which were seen as "an act of indiscipline", being eventually released. He signed almost immediately with CD Numancia, which had lost first-choice Jacobo to a severe knee injury.
In July 2008, after having made no official appearances for the Soria-based club, Aragoneses returned to Tenerife after a five-year absence: after winning the battle for first-choice with Luis García, however, he was sidelined until the end of the season with a case of acute pancreatitis. Once again he fully recovered, being the undisputed starter in 2009–10's top flight (all matches and minutes in an eventual relegation, only certified however in the last round).
- El Alavés arruina el regreso al Tenerife (Alavés ruins Tenerife's return); El País, 27 August 2001 (in Spanish)
- El Atlético ficha a Aragoneses para suplir a Burgos (Atlético sign Aragoneses to replace Burgos); El Mundo, 26 January 2004 (in Spanish)
- Atlético clinch Franco move; UEFA.com, 15 June 2004
- Trochowski takes Hamburg option; UEFA.com, 3 January 2005
- Aragoneses sufre un mal testicular (Aragoneses with testicular ailment); El País, 31 August 2005 (in Spanish)
- La segunda batalla de Aragoneses (Aragoneses' second battle); El Correo, 23 January 2007 (in Spanish)
- El meta del Hércules Aragoneses supera un cáncer de testículos (Hércules keeper Aragoneses overcomes testicular cancer); Marca, 30 March 2007 (in Spanish)
- Aragoneses se va del Hércules (Aragoneses leaves Hércules); Marca, 31 January 2008 (in Spanish)
- El Numancia ficha al portero Sergio Aragoneses (Numancia signs goalkeeper Sergio Aragoneses); Diario AS, 12 February 2008 (in Spanish)
- Aragoneses continúa hospitalizado por una pancreatitis (Aragoneses still in hospital with pancreatitis); Marca, 5 March 2009 (in Spanish)