UFC star Valentina Shevchenko -- one of the top MMA fighters on the planet -- thinks the judges got it wrong ... and Joanna Jedrzejczyk should have gotten the decision over Weili Zhang.
"I don't believe [the judges got it right]," Shevchenko told us in NYC ... claiming Joanna landed "more clear strikes" than her opponent.
In fact, when you watch our clip with Valentina ... even though she's very respectful about Weili, it's pretty clear she wasn't super impressed with Zhang's performance.
We asked Valentina if she would be interested in dropping down a weight class to fight Zhang, but Shevchenko doesn't think Weili wants the smoke.