Tips for sparring 30 pd bigger southpaw..

That's actually true. They expect you to constantly circle in that direction and sometimes turn with you and compound your movement, making them appear on your other side.

Martinez makes space to throw away from the opponent's lead hand by constantly walking towards it first. The space behind the opponent opens up for him to maneuver in that direction when he throws a lead or a counter.

Very true about Ward, he set up lots of shot inside the lead leg by closing the distance first.