Sergio Reguilón Rodríguez (born 16 December 1996) is a Spanish professional footballer who plays as a left-back for La Liga club Atlético Madrid, on loan from Tottenham Hotspur, and the Spain national team. Reguilón came through Real Madrid's youth academy in 2015 and was loaned to other Spanish clubs throughout his career. Club career Real Madrid Reguilón joined Real Madrid's youth setup in 2005, aged eight. On 5 August 2015, after finishing his formation, he was loaned to Segunda División B side UD Logroñés for the season. Reguilón made his senior debut on 23 August 2015, playing the last seven minutes in a 3–0 home win against SD Compostela. The following 16 January, after being sparingly used, he returned to Los Blancos and was assigned to the reserves also in the third division. On 23 August 2016, Reguilón returned to Logroñés also in a one-year loan deal. Now an undisputed starter, he scored eight goals during the campaign; highlights included four past Bilbao Athletic on 2 October 2016 (5–3 home win). Upon returning to Castilla, Reguilón was a first-choice in Santiago Solari's side, and renewed his contract on 11 May 2018. On 25 August of that year, he was promoted to the main squad by manager Julen Lopetegui. Reguilón made his professional debut on 2 October 2018, starting in a 0–1 UEFA Champions League away loss against PFC CSKA Moscow. He also made his league debut on 3 November 2018, starting in a 2–0 La Liga home win against Real Valladolid. Sevilla (loan) On 5 July 2019, Reguilón was loaned to Sevilla for the 2019–20 season. On his official debut on 18 August, he scored the opener in a 2–0 success over RCD Espanyol at the RCDE Stadium. With Sevilla, Reguilón established himself as a regular starter and won the 2019–20 UEFA Europa League. Tottenham Hotspur On 19 September 2020, Reguilón joined Tottenham Hotspur on a five-year deal with a reported £27.5m buy-back clause. He made his debut on 29 September 2020, in the home game against Chelsea in the fourth round of the League Cup, in which he assisted teammate Erik Lamela's equalising goal, which was then followed by a penalty shootout. Spurs won 5–4 on penalties putting them through to the next round of the competition. He made his Premier League debut on 4 October, in a 6–1 win away to Manchester United. On 21 November 2021, Reguilón