During the 2019–20 season, Alaba was converted to the centre-back position, often partnering up with Jérôme Boateng, due to an injury crisis. He adapted to the position very well and soon became the leader of the defense. On 23 August 2020, he played the full 90 minutes at centre-back as Bayern beat Paris Saint-Germain 1–0 in the 2020 UEFA Champions League Final. Bayern Munich went on to have their second remarkable treble-winning season after 2012–13, and thereby Alaba securing his second continental treble in his career.