A product of Atlético Madrid's youth system, Suárez was born in Alcobendas, Madrid. He first appeared with the first team on 6 November 2005, playing four minutes in a 0–0 draw at Sevilla FC[4] and going on to make a further three La Liga appearances during the season, including two 90-minute games.
After two seasons appearing regularly – in the second, he scored five goals in 34 matches to help the Balearic Islands side qualify for the UEFA Europa League – the rebuy clause was activated and Suárez returned to the Colchoneros.[9] In his debut campaign in his second spell, he battled for first-choice status at holding midfielder with Brazilian Paulo Assunção.[10] He netted his first official goal for the club on 10 April 2011, in a 3–0 home win against Real Sociedad.[11]
On 10 August 2014, Suárez was knocked unconscious in a friendly against VfL Wolfsburg, after teammate Cristian Ansaldi's hip hit his head. He suffered a "traumatic brain injury" and stayed for treatment in Germany, while the rest of the team returned to Spain.[12] However, on 19 August, he played the entire first leg of the Supercopa de España, a 1–1 draw away to Real Madrid.[13]
On 24 July 2015, Suárez signed for Serie A club ACF Fiorentina, with Stefan Savić moving in the opposite direction.[15] He appeared in only 13 competitive games during his six-month tenure, his maiden league appearance occurring on 23 August in a 2–0 home victory over AC Milan (23 minutes played).[16]
Suárez's sole goal for the Viola came on 1 November 2015, in a 4–1 rout of Frosinone Calcio.[17]
Watford
On 30 January 2016, after weeks of negotiations, Watford announced the signing of Suárez on a four-and-a-half-year contract, for a €4 million transfer fee.[18][19] His first Premier League appearance occurred four days later, as he came on as an 87th-minute substitute for Étienne Capoue in a 0–0 home draw against Chelsea.[20]
Suárez signed for Valencia CF on a season-long loan deal on 16 August 2016, with an option of a subsequent purchase.[21] He scored his first brace as a senior on 16 October, in a 2–1 victory at Sporting de Gijón.[22]
On 6 February 2013, Suárez earned his first cap for the full side, playing the last 20 minutes of the 3–1 friendly win over Uruguay in Doha, Qatar.[30]
^"贵州官宣西班牙中场正式加盟 曾随马竞登顶西甲" [Guizhou officially announced arrival of Spanish midfielder] (in Chinese). Sina Sports. 11 July 2017. Retrieved 11 July 2017.