|Full name||Matías Nahuel Leiva Esquivel|
|Date of birth||22 November 1996|
|Place of birth||Rosario, Argentina|
|Height||1.75 m (5 ft 9 in)|
|2016–2018||→ Betis (loan)||17||(0)|
|2018||→ Barcelona B (loan)||18||(5)|
* Senior club appearances and goals counted for the domestic league only and correct as of 2 June 2018|
‡ National team caps and goals correct as of 1 September 2017
Born in Rosario, Santa Fe, Argentina, Nahuel moved to Spain at only 14, joining Villarreal CF's youth setup. He made his senior debuts with the C-side in 2012–13, in Tercera División, and also appeared occasionally for the reserves during that first season.
Nahuel made his first-team – and La Liga – debut on 13 January 2014, playing 23 minutes in a 5–1 home routing of Real Sociedad. On 28 August he scored his first professional goal, netting the last in a 4–0 home win against FC Astana for the campaign's UEFA Europa League.
Nahuel was part of the Spanish under-19 team which won the 2015 UEFA European Championship in Greece. He scored in a 3–0 group stage opening victory against holders Germany, adding the second goal in the 2–0 win over Russia in the decisive match in Katerini.
- Spain U19
- Conociendo a Matías Nahuel Leiva (Knowing Matías Nahuel Leiva); Futbolistas Argentinos por el Mundo, 8 October 2013 (in Spanish)
- Five-star Villarreal cruise to win Archived 25 February 2014 at the Wayback Machine.; ESPN FC, 13 January 2014
- ¡Europa, ya estamos aquí! (4–0) (Europe, we have arrived! (4–0)) Archived 4 September 2014 at the Wayback Machine.; Villarreal CF, 28 August 2014 (in Spanish)
- Real Betis signs Nahuel for the next two seasons Archived 30 July 2016 at the Wayback Machine.; Real Betis, 16 June 2016
- Nahuel jugará cedido en el Real Betis (Nahuel will play on loan at Real Betis); Villarreal CF, 16 June 2016 (in Spanish)
- "Agreement with Villarreal CF for the loan of Nahuel Leiva". FC Barcelona. 30 January 2018. Retrieved 2 February 2018.
- "Slick Spain too strong for holders Germany". UEFA. 7 July 2015. Retrieved 29 July 2015.
- "Spain see off Russia for seventh Under-19 crown". UEFA. 19 July 2015. Retrieved 20 July 2015.