2018 ABN AMRO World Tennis Tournament – Singles

Jo-Wilfried Tsonga was the defending champion, but withdrew before the tournament began with a left hamstring injury.

Roger Federer regained the ATP No. 1 singles ranking by reaching the semifinals and went on to win his third title in Rotterdam, defeating Grigor Dimitrov in the final, 6–2, 6–2.

Seeds
• # Roger Federer (champion)

• #🇧🇬 Grigor Dimitrov (final)

• #🇩🇪 Alexander Zverev (second round)

• #🇧🇪 David Goffin (semifinals, retired due to eye injury)

• # Stan Wawrinka (first round)

• #🇨🇿 Tomáš Berdych (quarterfinals, withdrew due to illness)

• #🇫🇷 Lucas Pouille (first round)

• #🇫🇷 Jo-Wilfried Tsonga (withdrew)

• #🇱🇺 Gilles Müller (first round)

Seeds
• # 🇷🇺 Daniil Medvedev (qualified)

• # 🇺🇿 Denis Istomin (first round)

• # 🇫🇷 Pierre-Hugues Herbert (qualified)

• # 🇮🇹 Andreas Seppi (qualifying competition, lucky loser)

• # Stefanos Tsitsipas (first round)

• # 🇮🇹 Thomas Fabbiano (first round)

• # 🇫🇷 Nicolas Mahut (qualifying competition, lucky loser)

• # 🇱🇹 Ričardas Berankis (qualifying competition)

Qualifiers
• # 🇷🇺 Daniil Medvedev

• # 🇧🇪 Ruben Bemelmans

• # 🇫🇷 Pierre-Hugues Herbert

• # 🇸🇰 Martin Kližan

Lucky losers
• # 🇮🇹 Andreas Seppi

• # 🇫🇷 Nicolas Mahut