Albert Ramos Viñolas defeatedCameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the2021 Estoril Open. It marked his third careerATP Tour singles title, all of which have been onclay. Norrie was aiming to win his first ATP Tour title in his second final.[1]
Stefanos Tsitsipas was the defending champion from when the tournament was last held in2019,[2] but did not return to compete.