make a 4

Berdych makes one of the clearest 4″s with his figures on the release of the toss– thumb inside the hand other figures make a 4 — the premise of the 4 is seal the side doors and have the toss only come out the top door

grab

you need to grab the hit in the sweet spot of the racquet– even off by a string or two will lead to a diminished hit

drive the slice

once you make contact on the slice backhand you want to drive out– big person element is to accelerate through the hit

more stepping up

when the incoming ball lands short step up into the court with a full preparation attack the shot with a full follow through