On 16 August 2019, Aduriz scored the only goal in a 1–0 victory against Barcelona through a bicycle kick in the last minute of the first league fixture, helping his side to their first league win against that opposition since 2013 and also equalling Lionel Messi's record of scoring in 15 consecutive league seasons. He had a stoppage-time penalty saved in a match away to previous employers Mallorca four weeks later, and injuries then caused him to miss three months of matches over that winter. He returned to play a role from the bench in wins over Barcelona and Granada in February that helped the team qualify for the 2020 Copa del Rey Final, but did not score again himself before the season was suspended due to the COVID-19 pandemic in Spain– his last appearance being as a last-minute substitute in a win over another former club, Valladolid.