2018 Gazprom Hungarian Open – Singles

Lucas Pouille was the defending champion, but lost in the second round to John Millman.

Marco Cecchinato won his first ATP title, defeating Millman in the final, 7–5, 6–4. Cecchinato was a lucky loser, the ninth in ATP Tour history to win a title.

Seeds
The top four seeds received a bye into the second round. • #🇫🇷 Lucas Pouille (second round)

• #🇧🇦 Damir Džumhur (second round)

• #🇫🇷 Richard Gasquet (second round)

• #🇨🇦 Denis Shapovalov (second round)

• # Aljaž Bedene (semifinals)

• #🇭🇺 Márton Fucsovics (first round)

• #🇩🇪 Jan-Lennard Struff (quarterfinals)

• #🇮🇹 Andreas Seppi (semifinals)

Seeds
• # 🇨🇾 Marcos Baghdatis (first round)

• # 🇮🇹 Marco Cecchinato (qualifying competition, lucky loser)

• # 🇮🇹 Matteo Berrettini (qualified)

• # 🇦🇹 Gerald Melzer (first round)

• # 🇺🇦 Sergiy Stakhovsky (first round)

• # 🇺🇸 Tim Smyczek (first round)

• # 🇧🇷 Thiago Monteiro (qualifying competition)

• # 🇩🇪 Yannick Maden (qualifying competition, lucky loser)

Qualifiers
• # 🇵🇱 Hubert Hurkacz

• # 🇪🇪 Jürgen Zopp

• # 🇮🇹 Matteo Berrettini

• # 🇮🇹 Lorenzo Sonego

Lucky losers
• # 🇮🇹 Marco Cecchinato

• # 🇩🇪 Yannick Maden