2009 Natomas Men's Professional Tennis Tournament – Singles

Donald Young chose to not defend his 2008 title.

Santiago Giraldo won this tournament. He won against Jesse Levine 7–6(4), 6–1 in the final.

Seeds
• # 🇺🇸 Robert Kendrick (quarterfinals)

• # 🇺🇸 Wayne Odesnik (first round)

• # 🇺🇸 Kevin Kim (second round)

• # 🇺🇸 Jesse Levine (final)

• # Roko Karanušić (first round)

• # 🇨🇴 Santiago Giraldo (champion)

• # 🇺🇸 Ryan Sweeting (first round)

• # Grega Žemlja (first round)