2017 Ricoh Open – Men's singles

The 2017 Ricoh Open was a tennis tournament played on outdoor grass courts. It was the 28th edition of the Rosmalen Grass Court Championships, and part of the 250 Series of the 2017 ATP World Tour, and of the WTA International tournaments of the 2017 WTA Tour. Both the men's and the women's events took place at the Autotron park in Rosmalen, 's-Hertogenbosch in the Netherlands, from June 12 through June 18, 2017.

Nicolas Mahut was the two-time defending champion, but lost in the second round to Julien Benneteau. Gilles Müller won the title, defeating Ivo Karlović in the final, 7–6(7–5), 7–6(7–4).

Seeds
The top four seeds receive a bye into the second round. • # Marin Čilić (semifinals)

• #🇩🇪 Alexander Zverev (semifinals)

• # Ivo Karlović (final)

• #🇱🇺 Gilles Müller (champion)

• #🇧🇪 Steve Darcis (first round)

• # Robin Haase (first round)

• #🇫🇷 Nicolas Mahut (second round)

• #🇬🇧 Aljaž Bedene (quarterfinals)

Seeds
• # 🇷🇺 Daniil Medvedev (qualified)

• # 🇨🇦 Vasek Pospisil (qualified)

• # 🇫🇷 Julien Benneteau (qualifying competition, lucky loser)

• # Jason Jung (qualifying competition, lucky loser)

• # 🇧🇾 Egor Gerasimov (first round)

• # 🇩🇪 Benjamin Becker (first round)

• # 🇯🇵 Tatsuma Ito (qualified)

• # 🇺🇸 Dennis Novikov (qualified)

Qualifiers
• # 🇷🇺 Daniil Medvedev

• # 🇨🇦 Vasek Pospisil

• # 🇯🇵 Tatsuma Ito

• # 🇺🇸 Dennis Novikov

Lucky losers
• # 🇫🇷 Julien Benneteau

• # Jason Jung