All around the world tennis coaches can be heard telling their clients to “Step into the Ball”
This is something that no high level player has done for over 20 years
If you step into the ball, then you will inevitably step first and hit the ball second. This results in the lower body being totally isolated from the upper body and providing less influence on the striking of the ball than if the player simply stood still and hit.
Instead of this antiquated yet common advice, think about pushing from the toes of whatever foot is carrying the most weight.
If you “Step into the Ball” Nothing happens . . . .