On 4 January 2015, aged just 16, he made his senior debut with the reserves by coming on as a second-half substitute in a 0–3 Segunda División B home loss against UE Sant Andreu.
[3] Promoted to the B-team ahead of the 2017–18 season, he was a first-choice in Lubo Penev's side,[4] scoring his first senior goal on 26 August 2017 in a 4–1 home routing of CF Peralada-Girona B.
On 9 July 2018, Villar returned to Elche, being assigned to the main squad in Segunda División;[5] Valencia retained 80% of his future transfer.
[10] On 13 January 2022, Villar returned to his home country after agreeing to a loan deal with La Liga side Getafe CF until the end of the season.
[14] Due to the isolation of some national team players following the positive COVID-19 test of Sergio Busquets, Spain's under-21 squad were called up for the international friendly against Lithuania on 8 June 2021.