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.

Seeds
• # 🇷🇸 Novak Djokovic (quarterfinals)

• # 🇦🇹 Dominic Thiem (quarterfinals)

• # Stefanos Tsitsipas (second round)

• # 🇷🇺 Daniil Medvedev (quarterfinals)

• # 🇷🇺 Andrey Rublev (champion)

• # 🇦🇷 Diego Schwartzman (withdrew)

• # 🇫🇷 Gaël Monfils (first round, retired)

• # 🇨🇦 Denis Shapovalov (first round)

Seeds
• # 🇩🇪 Jan-Lennard Struff (moved to main draw)

• # Nikoloz Basilashvili (first round)

• # 🇮🇹 Lorenzo Sonego (qualifying competition, lucky loser)

• # 🇬🇧 Kyle Edmund (first round)

• # Aljaž Bedene (qualified)

• # 🇨🇦 Vasek Pospisil (qualified)

• # 🇫🇷 Pierre-Hugues Herbert (first round)

• # 🇭🇺 Attila Balázs (qualified)

Qualifiers
• # 🇭🇺 Attila Balázs

• # 🇸🇰 Norbert Gombos

• # Aljaž Bedene

• # 🇨🇦 Vasek Pospisil

Lucky losers
• # 🇮🇹 Lorenzo Sonego

• # Jason Jung

• # 🇺🇦 Vitaliy Sachko