Understanding Tennis

get the back knee below the incoming flight path

keep your eyes up and see the hit

as you track the ball in slot your head and keep it there for a beat past the hit

back for is inside the front foot and angled in– presets the  shoulder and hip rotation

you want to go up and out before you rotate 

Medvedev has a great quick to the finish

up and out on the finish

you need to get the back knee below the incoming  flight path 

pull the step in leg in and away to create the space needed to hit

when facing a power hitter get back more to give yourself more time handle the power