Leonardo "Leo" Cecilio Fernández López (born 8 November 1998) is a Uruguayan professional footballer who plays as an attacking midfielder for Liga AUF Uruguaya club Peñarol.
Born in Montevideo, Fernández joined Fénix's youth setup in 2011, from lowly CSyD Amanecer. On 31 May 2015, aged just 16, he made his first team – and Primera División – debut, coming on as a late substitute for Martín Ligüera in a 2–0 away loss against Peñarol.
After spending his first two seasons as a backup, Fernández started to appear regularly from the 2017 campaign onwards. He scored his first professional goal on 25 March of that year, netting the winner in a 2–1 home defeat of El Tanque Sisley.
On 4 March 2018, Fernández scored a brace in a 3–2 defeat to Defensor Sporting. On 29 July, he scored a hat-trick in a 5–0 away routing of Cerro, and finished the campaign with 11 goals, playing a key part as his side narrowly avoided relegation.
On 24 June 2019, Fernández joined Mexican club Tigres UANL on a free transfer. He was immediately loaned out to Club Universidad de Chile.
On 12 December 2019, Fernández joined Deportivo Toluca on a season-long loan. Despite his stellar form, head coach Ricardo Ferretti relegated him to a supporting role upon rejoining Tigres UANL. On 19 December 2021, Fernández joined Toluca on permanent basis.
On 4 July 2023, Fernández joined Fluminense on a one-year loan. The loan was terminated early after the player failed to make an impact at the club.
On 17 January 2024, Fernández joined Peñarol on a one-year loan. He finished the season as the league's top scorer with 16 goals. On 5 January 2025, Peñarol reached an agreement to sign Fernández for a reported fee of US$7 million, a record for uruguayan football.
As a youth international, Fernández has represented Uruguay at the 2015 South American U-17 Championship and the 2019 Pan American Games.
CONCACAF Champions League: 2020
FIFA Club World Cup runner-up: 2020
Uruguayan Primera División: 2024
Uruguayan Primera División player of the season: 2024
Uruguayan Primera División young player of the season: 2018
Uruguayan Primera División team of the season: 2018, 2024
Uruguayan Primera División top scorer: 2024
Liga MX player of the month: January 2020