Cris Cyborg: Holly Holm Should Be Afraid

Cris Cyborg says she's not sweating Holly Holm's famous leg-striking power -- it's Holly who should be worried about Cyborg's fists.

The UFC superstar joined the guys on the "TMZ Sports" TV show (airs tonight on FS1) -- and told us why the former bantamweight champ should be afraid ... very afraid.

Cyborg vs. Holm is the main event at UFC 219 on Dec. 30 in Vegas -- and Cris says she's trying to rally her fans to help out the kids at the local hospitals while she's in town.

Watch the clip and click here to see how you can help in Cyborg's Teddy Bear drive!