2012 Proton Malaysian Open – Singles

Janko Tipsarević was the defending champion but decided to participate at 2012 PTT Thailand Open instead. Juan Mónaco won the title, beating Julien Benneteau 7–5, 4–6, 6–3 in the final.

Seeds
• # 🇪🇸 David Ferrer (semifinals)

• # 🇦🇷 Juan Mónaco (champion)

• # 🇯🇵 Kei Nishikori (semifinals)

• # 🇺🇦 Alexandr Dolgopolov (second round)

• # 🇪🇸 Feliciano López (second round)

• # 🇪🇸 Pablo Andújar (first round)

• # 🇫🇷 Julien Benneteau (final)

• # 🇦🇹 Jürgen Melzer (first round, retired because of a left quadriceps injury)

Seeds
• # 🇨🇦 Vasek Pospisil (moved to main draw)

• # 🇺🇸 Michael Yani (qualified)

• # 🇮🇹 Riccardo Ghedin (qualified)

• # Christopher Rungkat (second round)

• # 🇮🇳 Sanam Singh (qualifying competition, lucky loser)''

• # 🇯🇵 Toshihide Matsui (qualifying competition)

• # 🇦🇺 Nick Lindahl (second round)

• # 🇰🇷 Jun Woong-sun (second round)

Qualifiers
• # 🇬🇧 Dominic Inglot

• # 🇺🇸 Michael Yani

• # 🇮🇹 Riccardo Ghedin

• # 🇦🇹 Julian Knowle

Lucky loser

 * 1) 🇮🇳 Sanam Singh