'Kardashians' Star -- No Evidence Khloe's Dating NBA Star

She's hooked up with jocks before, but the new rumors about Khloe Kardashian dating NBA star Robin Lopez seems like BS ... so says Kim's BFF Jonathan Cheban.

Cheban -- who's super tight with all of the Kardashian sisters -- was leaving Craig's in West Hollywood last night when we asked about reports that Khloe and Robin have become an item.

"I was with her yesterday, I didn't hear anything about that," Cheban told us.

The "Keeping Up with the Kardashians" star said he wouldn't be shocked if Khloe eventually began dating another famous athlete ... explaining that a relationship with a normie can get pretty boring for someone on Khloe's level.

As for Robin, he also shot down the rumors this weekend ... and says the media made up the story.

"Obviously they were looking for two people with a lot of influence on popular culture, on the youth, and they were looking for two movers and shakers," Lopez said.