Club: CD Leganés (commonly "Leganés") — Spanish professional football club based in Leganés, Community of Madrid.

• Founded: 1928 (Club Deportivo Leganés).
• Stadium: Estadio Municipal de Butarque — capacity roughly 12,000–13,000 (commonly cited around 12,500).
• Club colours: Blue and white.

Context around the 2020/21 season

• Following the 2019/20 season, Leganés were relegated from LaLiga and therefore competed in the 2020/21 Segunda División, aiming for immediate promotion back to the top flight.
• Head coach: José Luis Martí (often referenced as Lluís/LLUIS MARTI by some sources) was appointed during the 2020/21 campaign (appointed in November 2020) and led the team through the remainder of that season. Martí is a former professional midfielder who transitioned into coaching and had prior managerial experience in Spanish football before taking charge at Leganés.
• The squad for that season combined players retained from the LaLiga roster and signings adapted to the demands of Segunda División; the club also participated in the Copa del Rey as usual.

Notes and highlights

• Butarque remained a compact, vociferous home ground and a notable factor in the club’s home performances.
• Martí’s arrival represented a mid-season change intended to stabilize results and push for competitiveness in the promotion race.

If you need exact 2020/21 league position, full match results, squad list, player statistics, or a timeline of managerial changes, I can provide those specific data points.