Albert Ramos Viñolas defeated
Cameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the 2021 Estoril Open. It marked his third career
ATP Tour singles title, all of which have been on
clay. 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 in
2019,[2] but did not return to compete.
Seeds
The top four
seeds received a
bye into the second round.