Double Olympic Champion Kayla Harrison reveals her most effective Newaza technique - Juji gatame - across nine brilliant videos, exclusively on Superstar Judo.

She is joined by eight of world judo's groundwork experts, all of whom coach some of the most successful armlocks ever seen in top level competition.

Don't miss Gordon's Juji gatame into Osaekomi, Burton's transition from standing, Bischof's Ashi Sankaku garami and some great variations from Adams.