In a 16-year professional career he appeared in 370 games, 201 in La Liga. Having started his career at Barcelona, where he had no impact for its first team – one match – he would be an important member of Villarreal's top-flight consolidation, representing the club for seven years.
Álvarez made a name for himself during his spell at Villarreal CF, where he was team captain when a starter. Having made 250 competitive appearances – second-most for the club behind Argentine Rodolfo Arruabarrena[3]– his role would diminish in the 2006–07 campaign however, as Villarreal finished fifth (only 15 matches).
In July 2007, Álvarez joined Recreativo de Huelva, where his season would be constantly bothered by injuries.[4] In one of his few league appearances, on 1 March 2008, he was sent off for a dangerous challenge on Real Madrid's Arjen Robben after just six minutes on the pitch (the former was brought on in the 64'), during a 2–3 home loss.[5] In 2008–09 he only took part in one league game for already doomed Recre, a 2–1 defeat at Sporting de Gijón in the last round,[6] and was subsequently released.
Coaching career
Retired at 34, Álvarez moved into coaching, starting with Barcelona's Juvenil A.[7] He returned to Villarreal on 26 September 2017, as part of his former teammate Javier Calleja's staff;[8] the pair were fired on 10 December 2018,[9] being reinstated the following 29 January after the dismissal of Luis García.[10][11]
Álvarez's father, Quique Costas, also a footballer and a defender, played professionally with RC Celta de Vigo and Barcelona. He later became a manager, coinciding with his son on one occasion.[16][17]
Álvarez's younger brother, Óscar, who occupied the same position, played mainly in the second and third tiers.[18]
^Artús, José Luis; Domènech, Oriol (27 July 2010). "Òscar entrenará al Juvenil A" [Òscar to coach Juvenil A]. Mundo Deportivo (in Spanish). Retrieved 5 February 2014.