Andreh Anderson is a black belt under Rey Diego at (www.reydiogo.com) and loves sweeping his opponents. Andreh has this to say about the single leg sweep:
“Most of you have probably seen the sweep itself, but I started using the entry when I was a brown belt and it worked really well. I used to get to this sweep from the De La Riva guard. I would push the far leg with my right leg while controlling both sleeves, sit up, and switch my grip so that his left arm was controlled between his legs.”
Here is the entry I use more often now since I have switched the hand in the collar for most of my open guard work.