For many players, getting the hang of the two-handed backhand ... power over to your left arm while keeping the right arm in the stroke. Now hit a few backhands using this grip.

To find the grip, hold the racket as if you were using the edge of the racket frame as an axe, that should be the correct grip. The V of your thumb and forefinger should be just to the left of the top ...

The key to understanding Zverev’s backhand is the way his grip and ... hit their two-handed backhand with both elbows bent 45 degrees or more at contact, almost like a left-handed forehand.