The 2018–19 season was an important season for the club with the Final Four taking place on its home court. A slow start caused Baskonia to part ways with head coach Pedro Martínez and bring back club legend Velimir Perasović to replace him. Baskonia kept struggling on the road, but won 10 of its last 11 regular season games - including victories against playoff-bound teams CSKA Moscow, Panathinaikos and Real Madrid - to reach the playoffs from sixth place. Baskonia managed to do something no team had done in over a decade - steal home-court advantage in a playoff series against CSKA, but the Russian powerhouse recovered with back-to-back wins at Buesa Arena to qualify for the Final Four and eventually win the title. Vincent Poirier was chosen to the All-EuroLeague Second Team. Baskonia had early exits in its two main domestic competitions; it lost against Joventut in the Copa del Rey quarterfinals and against Zaragoza in the Spanish League quarterfinals.