WNBA star Diamond DeShields took an immediate L courtesy of her teammate after getting a huge win Wednesday ... and the video of it is hilarious.
After the Chicago Sky beat the Phoenix Mercury, 101-87, DeShields earned the postgame interview attention as the star of the day ... and then Gabby Williams struck.
The reporter asks how big of a win it was ... and while Diamond's giving her answer -- Williams yells, "Hey, is your rash OK?!"
Diamond -- clearly embarrassed -- tries to laugh it off, turns to the camera and says, "Jokes!