2020 Erste Bank Open – Singles

Dominic Thiem was the defending champion, but lost to Andrey Rublev in the quarterfinals.

Rublev went on to win the title, defeating Lorenzo Sonego in the final, 6–4, 6–4. With his win over Novak Djokovic in the second round, Sonego became the first lucky loser to defeat a reigning world No. 1.