2012 Apia International Sydney – Men's singles

Gilles Simon was the defending champion but chose not to participate. Jarkko Nieminen won in the final against Julien Benneteau 6–2, 7–5.

Seeds
The top four seeds received a bye into the second round. • # 🇦🇷 Juan Martín del Potro (quarterfinals)

• # 🇺🇸 John Isner (second round)

• # 🇫🇷 Richard Gasquet (quarterfinals)

• # 🇪🇸 Feliciano López (second round)

• # 🇷🇸 Viktor Troicki (second round)

• # 🇩🇪 Florian Mayer (withdrew due to a right hip injury)

• # 🇪🇸 Marcel Granollers (first round)

• # 🇨🇿 Radek Štěpánek (second round)

Seeds
• # 🇵🇱 Łukasz Kubot (moved into main draw)

• # 🇺🇦 Sergiy Stakhovsky (moved into main draw)

• # 🇺🇸 Ryan Sweeting (qualifying competition, lucky loser)

• # 🇺🇿 Denis Istomin (qualified)

• # 🇧🇬 Grigor Dimitrov (second round, retired due to fatigue)

• # 🇫🇮 Jarkko Nieminen (qualified)

• # 🇦🇷 Leonardo Mayer (first round)

• # 🇫🇷 Nicolas Mahut (first round)

Qualifiers
• # 🇺🇸 Bobby Reynolds

• # 🇫🇮 Jarkko Nieminen

• # 🇺🇸 Michael Russell

• # 🇺🇿 Denis Istomin

Lucky loser

 * 1) 🇺🇸 Ryan Sweeting