|Full name||Diego Martín Alonso López|
|Date of birth||16 April 1975|
|Place of birth||Montevideo, Uruguay|
|Height||1.88 m (6 ft 2 in)|
|1999–2000||Gimnasia La Plata||32||(17)|
|2001–2002||→ Atlético Madrid (loan)||38||(22)|
|2008–2009||Gimnasia La Plata||36||(5)|
|* Senior club appearances and goals counted for the domestic league only.
After a brief spell in Argentina for Club de Gimnasia y Esgrima La Plata (he would also represent the side towards the end of his career), Alonso moved to Spain, where he played with five teams in as many years: Valencia CF, Atlético Madrid (where he scored 22 goals in 2001–02's second division, helping the Colchoneros return to La Liga, and forming an efficient offensive partnership with countryman Fernando Correa, who added 13), Racing de Santander, Málaga CF and Real Murcia, where he did not have a good scoring record overall. In between his fourth and fifth club, he played one year in Mexico with Club Universidad Nacional.
In 2006, 31-year-old Alonso returned to his country and joined hometown's Club Nacional de Football. However, shortly after, he moved abroad again, signing with Shanghai Shenhua F.C. in the Chinese Super League; after two slow seasons with Gimnasia, the veteran switched to C.A. Peñarol.
Alonso was chosen for the nation's squad for that year's Copa América, and scored on his quarterfinal penalty shootout attempt (5–3 win) for the eventual runners-up, also against Paraguay, the hosts. In spite of his season with Atlético, he was not selected for the 2002 FIFA World Cup, and subsequently criticized manager Víctor Púa.
- Bella Vista
- Atlético Madrid
- As of 14 January 2017[n 1]
- "El Valencia ficha a Salva y cede a Diego Alonso al Atlético" [Valencia signs Salva and loans Diego Alonso to Atlético] (in Spanish). El País. 28 July 2001. Retrieved 23 April 2016.
- "Diego Alonso: "Tenemos que disfrutar de cada segundo"" [Diego Alonso: "We have to enjoy every second"] (in Spanish). Diario AS. 10 May 2002. Retrieved 23 April 2016.
- "Diego Alonso y Correa no olvidan al Atleti" [Diego Alonso and Correa do not forget Atleti] (in Spanish). Mundo Deportivo. 7 August 2013. Retrieved 23 April 2016.
- "El Málaga ficha al uruguayo Diego Alonso" [Málaga signs Uruguayan Diego Alonso] (in Spanish). El Mundo. 21 August 2003. Retrieved 23 April 2016.
- "Copa América 1999". RSSSF. Retrieved 23 April 2016.
- "Diego Alonso: "Víctor Púa no ha sido fiel a sus principios"" [Diego Alonso: "Víctor Púa has not been faithful to his principles"] (in Spanish). Diario AS. 10 May 2002. Retrieved 23 April 2016.
- "Primos hermanos bajo distinta bandera" [First cousins under a different flag] (in Spanish). El País. 8 February 2001. Retrieved 23 April 2016.