Atg who fought w/foot behind the arm pit & why

Joe calzage https://m.youtube.com/watch?v=5UtqTccAodw 9:22
Amir khan https://m.youtube.com/watch?v=zyTXfvM6VaY
Andre Ward https://m.youtube.com/watch?v=26HwQHCCzYs
Ninito donare https://m.youtube.com/watch?v=ZTNRYxC3TpM best explanation ***** the pull and counter must see!

GGG back foot behind the armpit for leverage. https://m.youtube.com/watch?v=iQUORunPIXA:o

Scrap some of your movements come from the rear foot behind the arm pit!