[2] In the regular season, the scores of the games in La Liga played between the region's teams ('Basque football derbies') are used to create the standings.
[11] There were five eligible clubs and 20 fixtures between them in the 2019–20 La Liga campaign (Osasuna were promoted as winners of the 2018–19 Segunda División, while the top-tier teams all finished in mid-table within 6 points of one another).
[13] There were five eligible clubs and 20 fixtures between them in the 2020–21 La Liga campaign (the delayed 2020 Copa del Rey final between Athletic and Real Sociedad is not included).
There were three eligible clubs and six fixtures between them in the 2022–23 La Liga campaign (the 2022–23 Copa del Rey semi-final tie between Athletic Bilbao and Osasuna is not included).
There were four eligible clubs and 12 fixtures between them in the 2023–24 La Liga campaign (the 2023–24 Copa del Rey quarter-finals ties involving Athletic Bilbao v Alavés and Osasuna v Real Sociedad are not included).