| Sergio Fernández | |
| Fullname: | Sergio Fernández Álvarez |
| Birth Date: | 9 February 1975 |
| Birth Place: | León, Spain |
| Position: | Centre back |
| Youthclubs1: | Atlético Pinilla |
| Youthclubs2: | Puente Castro |
| Youthyears3: | 1991–1993 |
| Youthclubs3: | Logroñés |
| Years1: | 1993–1996 |
| Caps1: | 42 |
| Goals1: | 0 |
| Years2: | 1996–1997 |
| Caps2: | 14 |
| Goals2: | 0 |
| Years3: | 1997 |
| Caps3: | 0 |
| Goals3: | 0 |
| Years4: | 1998 |
| Caps4: | 3 |
| Goals4: | 0 |
| Years5: | 1998–1999 |
| Caps5: | 36 |
| Goals5: | 0 |
| Years6: | 1999–2000 |
| Caps6: | 24 |
| Goals6: | 0 |
| Years7: | 2000–2003 |
| Caps7: | 108 |
| Goals7: | 1 |
| Years8: | 2003–2009 |
| Caps8: | 210 |
| Goals8: | 7 |
| Years9: | 2009–2010 |
| Caps9: | 39 |
| Goals9: | 1 |
| Totalcaps: | 476 |
| Totalgoals: | 9 |
| Manageryears1: | 2013–2014 |
| Managerclubs1: | Betis (assistant) |
Sergio Fernández Álvarez (born 9 February 1975) is a Spanish retired footballer who played as a central defender.
Fernández was born in León, Castile and León. After playing most of his career in the third division (with a brief unassuming spell in the second with CD Numancia) he arrived at Hércules CF aged 28, and helped to a return to the second level in his second year.
Following the outstanding 2008–09 season, where his club narrowly missed on a La Liga return, negotiations broke down for renovation of Fernández's contract[1] so, in late June 2009, he agreed on a move to fellow league side Real Murcia.[2]
In the 2009–10 campaign, veteran Fernández was a defensive mainstay for Murcia, only missing three league games out of 42, but his team was eventually relegated. Aged 35 he decided to retire, being immediately appointed his last club's director of football; he moved to another former side, Hércules, in the following year, in the same capacity.[3]
On 2 December 2013, Álvarez joined newly appointed Juan Carlos Garrido's staff at Real Betis, following the dismissal of Pepe Mel.[4] On 16 June 2016 he was named sporting director at Deportivo Alavés, recently returned to the top flight.[5]