2013 Delray Beach International Tennis Championships – Singles

Kevin Anderson was the defending champion, but lost to John Isner in the quarterfinals.

Ernests Gulbis won the title, defeating Édouard Roger-Vasselin 7–6(7–3), 6–3 in the final.

Seeds
• # 🇺🇸 John Isner (semifinals)

• # 🇩🇪 Tommy Haas (semifinals)

• # 🇺🇸 Sam Querrey (second round)

• # 🇯🇵 Kei Nishikori (first round, retired)

• # 🇺🇦 Alexandr Dolgopolov (first round)

• # Kevin Anderson (quarterfinals)

• # 🇪🇸 Feliciano López (withdrew because of an arm injury)

• # 🇧🇪 Xavier Malisse (second round)

Seeds
• # 🇱🇹 Ričardas Berankis (qualifying competition, lucky loser)

• # 🇺🇸 Tim Smyczek (qualified)

• # Ernests Gulbis (qualified)

• # 🇧🇪 Ruben Bemelmans (first round, retired because of a lower back injury)

• # 🇨🇦 Vasek Pospisil (first round)

• # Gastão Elias (qualifying competition)

• # 🇨🇦 Frank Dancevic (second round)

• # 🇧🇷 Thiago Alves (first round)

Qualifiers
• # 🇺🇸 Bobby Reynolds

• # 🇺🇸 Tim Smyczek

• # Ernests Gulbis

• # 🇪🇸 Daniel Muñoz de la Nava

Lucky losers

 * 1) 🇱🇹 Ričardas Berankis