2009 Calabasas Pro Tennis Championships – Singles

Vince Spadea was the defending champion, but he was eliminated by qualifier Luka Gregorc already in the first round.

Donald Young defeated his compatriot Michael Russell 7–6(4), 6–1 in the final.

Seeds
• # 🇺🇸 Kevin Kim (second round)

• # 🇺🇸 Michael Russell (final)

• # 🇺🇸 Jesse Levine (second round, withdrew due to a hip flexor strain)

• # 🇨🇴 Santiago Giraldo (second round)

• # 🇺🇸 Taylor Dent (second round)

• # Roko Karanušić (first round)

• # Grega Žemlja (quarterfinals)

• # 🇨🇴 Carlos Salamanca (first round)