Navarro made his senior debut on 2 November 2014, coming on as a second half substitute for Rober Correa in a 2–1 away loss against Elche CF Ilicitano.[4] His first goal came on 5 September 2015, when he closed the 3–2 home win over FC Barcelona B.[5]
On 22 December 2015, Navarro signed a one-year extension with the club, with his new contract running until June 2017.[6] The following 4 January, however, he suffered a severe knee injury, being sidelined for six months.[7]
Navarro made his first-team – and La Liga – debut on 21 January 2017, starting and scoring the last goal in a 3–1 home victory against Granada CF[8] and becoming the first youth graduate to achieve the feat since Raúl Tamudo in 1997.[9] Eight days later, in his second appearance, he netted his team's second in a 3–1 defeat of Sevilla FC also at the RCDE Stadium.[10]
On 30 January 2017, Navarro extended his contract until 2021, being definitely promoted to the first team the following campaign.[11]
Watford
On 15 June 2018, Navarro joined Watford on a five-year deal for €2 million.[12][13] His maiden Premier League appearance took place on 29 September, when he played 84 minutes in the 2–0 loss at Arsenal.[14]
After only five competitive appearances in his first season,[15] Navarro returned to Spain and its top tier after agreeing to a one-year loan at CD Leganés on 24 July 2019.[16] He left Watford by mutual consent in August 2021.[17]
El Paso Locomotive
On 3 November 2022, Navarro signed for USL Championship club El Paso Locomotive FC.[18] One year later, having made the league's Team of the Week on two occasions, it was announced that he would not be returning for 2024.[19]
Arka Gdynia
On 29 March 2024, Navarro joined Arka Gdynia of the Polish I liga until the end of the season, with an option for another year.[20] He made his debut on 21 April, starting a 2–0 home victory over Wisła Płock.[21] In late May, as previously arranged, his contract was extended.[22]
Personal life
Navarro was a childhood friend of compatriot Héctor Bellerín, who also played in England with Arsenal. The former commented that both used to play football together in the garden of his grandmother's house.[23]
^Tovar, Pedro (10 July 2014). "El Espanyol tira de la cantera" [Espanyol go shopping in the youth setup] (in Spanish). La Segunda B. Retrieved 21 January 2017.