fold em

Phil Ivey -- one of the most dominant professional poker players in the world -- isn't suited for marriage ... dude was just granted a divorce from his wifeLuciaetta.

Ivey and Luciaetta filed the joint petition in a Nevadacourt on December 22 ... three days before Christmas. The divorce was granted today -- both parties were present for the ruling.

Phil -- who's reportedly made more than $12 million playing poker -- married Luciaetta back in 2002. The couple has no children together.

Fun Fact: Ivey is known in the card community as the "Tiger Woods of Poker" -- [insert your own joke here].