Marcelo Demoliner and Santiago González defeated Ariel Behar and Gonzalo Escobar in the final, 4–6, 6–3, [10–8], to win the doubles tennis title at the 2021 Stuttgart Open. It was their second title as a team, their first in three years. Behar and Escobar were contesting for their third title of the season.[1]
John Peers and Bruno Soares were the defending champions from when the tournament was last held in 2019,[2] but Peers chose not to participate. Soares played alongside Jamie Murray but lost in the first round to Demoliner and González [1]