Jamie McCarthy/Getty; Milos Bicanski/GC Images Princess Tatiana of Greece is hopping online for the first time since her ex-husband ... "So, thank you all for keeping me healthy.

Two women will put it all on the line at UFC 312 on Feb ... she steps into the Octagon versus fan favorite and long-time contender Tatiana Suarez. The two women have been on a collision course ...

But any time Suarez ... "I think Tatiana is a very dedicated athlete," Zhang said. "Her sport career is very long and she has a lot of things that I hope to learn from her. I think all UFC ...

Tatiana admitted she’s struggled ... but also the love with which they have walked all these years,” the couple said in a joint statement at the time. "Family will always be by their side.