Despite having different forehand grips, and Federer with a one handed backhand / Djokovic with a two handed backhand, notice the similarities with timing and rhythm.

Once the swing starts, there is no stopping. The swing path is on a very slight slope up with very little knee bend.

The player that has the most resemblance to a windshield wiper motion, more than any other top player, is Swiatek. When she makes contact with her forehand, the racket is still moving forward not just straight up. Her racket drop or launch point is not the same every time. Two are slightly below her waist, two are between her waist and shoulder, and one is just below her shoulder.

This is an example of an exaggerated knee bend, which I would not teach.

The coach in the video uses Alcaraz to demonstrate how to use your legs / bend your knees. Alcaraz barely bends his knees. The coach demonstrates exaggerated knee bend almost with bottom on the ground.

Coach demonstrates another ridiculous knee bend. I would never teach this.

Even Federer stands 15 to 20 feet behind the baseline at times.

Patrick Mouratoglou explains that every time you must be fully prepared before the ball bounces. Preparation is not exactly the same. Sometimes it's before the bounce, at the bounce, or after the bounce.

The video of Patrick Mouratoglou playing shows him preparing once if not twice after the bounce. This contradicts his statements in the video before.

Here are ten different player's forehands. Notice some barely bending their knees, some a little more, and maybe one with a definite knee bend. None of these are as exaggerated as the demonstrations by the coaches in the previous videos.

You see Federer using momentum going to his left, his right, forward, and back on an angle.

The player in the video has a better slice before the coach's advice. Slice is not a linear stroke.

This is a very good explanation of slice. This will contradict everything Patrick says in the next video.

Patrick describes Federer's backhand slice as the best ever. However, he says not to imitate his stroke. He states the slice should always go out toward the target, not across your body. The next three videos will show you several technically sound slices that go from left to right across the body.

The slice is going from left to right, across his body, whether he hits the ball cross court or down the line.

Another way I describe the slice is either outside the ball to inside the ball, or going from left to right.

You see the racket start on the left side of his body and follow through all the way across to the right side.