2013 Open de Nice Côte d'Azur – Singles

Nicolás Almagro was the two-time defending champion but decided not to participate. Albert Montañés won the title, defeating Gaël Monfils in the final, 6–0, 7–6.(7–3)

Seeds
The top four seeds received a bye into the second round. • # 🇨🇿 Tomáš Berdych (withdrew because of fatigue)

• # 🇫🇷 Gilles Simon (quarterfinals)

• # 🇺🇸 Sam Querrey (quarterfinals)

• # 🇺🇸 John Isner (second round)

• # 🇮🇹 Andreas Seppi (first round)

• # 🇮🇹 Fabio Fognini (second round)

• # 🇪🇸 Marcel Granollers (withdrew because of a shoulder injury)

• # 🇺🇿 Denis Istomin (first round)

Seeds
The top four seeds received a bye into the second round. • # 🇺🇸 Ryan Harrison (qualifying competition, lucky loser)

• # 🇧🇷 Rogério Dutra da Silva (qualified)

• # Thiemo de Bakker (qualifying competition)

• # 🇺🇦 Sergiy Stakhovsky (qualified)

• # 🇫🇷 Guillaume Rufin (qualified)

• # 🇫🇷 Adrian Mannarino (first round)

• # 🇫🇷 Florent Serra (second round)

• # 🇪🇪 Jürgen Zopp (first round)

Qualifiers
• # 🇫🇷 Guillaume Rufin

• # 🇧🇷 Rogério Dutra da Silva

• # 🇮🇹 Marco Cecchinato

• # 🇺🇦 Sergiy Stakhovsky

Lucky losers

 * 1) 🇺🇸 Ryan Harrison