Junior dos Santos says his toughest fight in the UFC was Roy Nelson

The UFC announced over the weekend that Junior dos Santos next title defense will come at the end of the year pay-per-view and he will be facing Cain Velasquez.

Dos Santos recently sat down with Jon Anik for a segment on “UFC Ultimate Insider” and the interview ran last night. During the interview, Anik asked the champion who is toughest test in the UFC has been and he said Roy Nelson.

“My toughest fight in the UFC, I think was Roy Nelson,” Dos Santos said. “That fight was tough for me caused it frustrated me a lot. I hit the guy a lot and he did not feel my punches and that frustrated me a lot.”

Dos Santos full interview from the show is below and he also talks about the comments that former Strikeforce heavyweight champion Alistair Overeem has said about him.