|Full name||Luís Carlos Ramos Martins|
|Date of birth||10 June 1992|
|Place of birth||Lamego, Portugal|
|Height||1.76 m (5 ft 9 in)|
|Playing position||Left back|
|Marítimo (loan from Granada)|
|2015–2016||→ Osasuna (loan)||9||(0)|
|2017–||→ Marítimo (loan)||10||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 15 April 2017.
Born in Lamego, Viseu District, Martins was promoted to S.L. Benfica's first team for the 2011–12 season. He made his official debut for the club on 2 November 2011, starting in a UEFA Champions League group stage game against FC Basel and being replaced at the hour-mark of the 1–1 home draw by Miguel Vítor.
Martins started the 2012–13 campaign with Benfica's reserves, in the second division. On 9 January 2013, however, he signed a three-and-a-half-year contract with Gil Vicente F.C. in the Primeira Liga.
On 1 September 2014, Martins agreed to a four-year deal with Granada CF from Spain, for an undisclosed fee. He played his first game in La Liga on the 27th, coming on as a second-half substitute in a 0–6 away loss to FC Barcelona.
On 24 August 2015, Martins was loaned to Segunda División side CA Osasuna, for one year. Late into the 2017 January transfer window, after only 73 minutes of action upon his return to the Estadio Nuevo Los Cármenes, he joined C.S. Marítimo on a two-year loan.
- "Basel's Huggel pegs back Benfica". UEFA.com. 2 November 2011. Retrieved 8 November 2011.
- "Benfica: Luís Martins no Gil Vicente por três anos e meio" [Benfica: Luís Martins to Gil Vicente for three-and-a-half years] (in Portuguese). Mais Futebol. 9 January 2013. Retrieved 9 January 2013.
- "El internacional Portugués sub-21 Luis Martins, refuerzo para el Granada CF" [Portuguese under-21 international Luis Martins, addition to Granada CF] (in Spanish). Granada CF. 1 September 2014. Retrieved 2 September 2014.
- "Barcelona 6–0 Granada". BBC Sport. 27 September 2014. Retrieved 23 January 2017.
- "Luis Martins jugará cedido en el CA Osasuna" [Luis Martins will play on loan at CA Osasuna] (in Spanish). CA Osasuna. 24 August 2015. Retrieved 24 August 2015.
- "Luís Martins y Sergi Guardiola se quedan sin ficha" [Luís Martins and Sergi Guardiola left unregistered]. Granada Hoy (in Spanish). 2 September 2016. Retrieved 23 January 2017.
- "Luís Martins vai fazer tudo para "aproveitar a oportunidade"" [Luís Martins will do what it takes to “seize the opportunity”] (in Portuguese). C.S. Marítimo. 23 January 2017. Retrieved 23 January 2017.
- "Oscar treble wins thrilling final for Brazil". FIFA.com. 20 August 2011. Retrieved 20 April 2016.