The fourth thing that every high-level tennis player does when hitting a backhand is follow through. Extend out in the direction you are hitting the ball, then smoothly bend the elbows and wrap the racket up over your shoulder.
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This video falls under tennis Backhands.
When you hit the tennis ball on your non-dominant side, you are hitting a backhand. You can hit a backhand two ways: with one hand or with two. Early on in your development as a player you have to choose one way or the other. There's also the slice backhand, which is almost always hit with one hand, that's used less often but is still an important shot to master.