Rachel Uchitel Back on the Market -- Divorce FINAL

Tiger Woods' maiden mistress Rachel Uchitel is now free to bang whomever she pleases ... because we've learned she's officially single again.

TMZ has learned ... her divorce from Matt Hahn was made final on Monday. The couple got married in 2011 and have a daughter. Their break-up was nuclear. Matt -- a former football star at Penn State and now a finance guy -- said he was the victim of cruel and inhumane treatment but ultimately backed off the claim.

We're told Uchitel got primary physical custody of daughter Wyatt and Hahn gets visitation.

On the financial front -- no money is changing hands. We're told there's a prenup that handles everything, and neither will get spousal support.

You've been warned, Lindsey Vonn.