Claudio Calasans Jr. had a great year in 2015.
He finally won his first world title as a black belt and then crowned the season with the ADCC open class gold medal.
In this video, he teaches a nice sweep using the X-Guard, but with a few modifications.
Notice that he does not put one of his legs on the same place you’d usially do in a traditional X-Guard.
Instead, he keeps his foot on the opponent’s groin area so he can prevent the adversary from hugging his head.
Pay attention and add the technique to your bottom game.