This position is magic on the forehand. I call it “the press slot,” because it’s a dynamic position you reach by pressing with your pecs – the strong muscles in your chest.
If you do it right, as you pass through this part of the swing, it’ll feel seamless. The energy will flow through your chest and your shoulder and into your contact action, which will strike through the ball exactly as you intended.
How the Chest Powers the Forehand
Every human being has a big, strong muscle group in their chest, known as the “pectoral muscles.” These muscles are responsible for pressing the hands and arms forward. In order to hit a maximally efficient forehand, we need to recruit these muscles.
To do so, we probe the ball away from our body – out to our hitting side, and in front of us. Then, as we turn forwards, we press the arm across, resisting its backwards momentum, and ultimately flinging it out behind the ball in a way that causes the racket to effortlessly smack through it.
There are two kinds of anatomical motion which are relevant here.
1. Horizontal Shoulder Adduction
When the pecs contract, the angle between the humerus (the bone through your upper-arm) and the chest closes. This sends your hand forward.

2. Internal Shoulder Rotation
A consequence of pressing forward is that your shoulder wants to internally rotate. You’ll strike the ball just as this internal rotation starts. It feels like a “shoulder release” action, and you can use that feeling to time your swing. This press-and-roll feeling: where you fire your racket into the press-slot with the chest, and feel the arm roll through and after contact, is critical for a fault tolerant forehand.

Finding Your Press Slot
Though your forehand’s kinetic chain physically starts from the ground, the swing’s intention starts with your racket-head’s final strike through the ball. The early part of the swing must be executed in such a way so as to set up the late part of your swing. Visualize that final contact action – where all of your rotational energy ends up linear, in the tip of the racket-head, striking through the ball in space. Your pressing action exists to set that up.
Weighted shadow swings are the best tool here if you’ve never felt this before. When you swing a weight, you’ll get much more precise feedback about whether or not you’re pressing in a way that’s comfortably producing power.

Press Across Your Body (But Not Really)
When we imagine “pressing” the arm forward, we imagine it coming across our body – horizontal shoulder adduction. On the forehand, this adduction occurs only minimally early in the swing, despite active contraction of the pecs. This is because the racket has backwards inertia relative to your trunk, which is twisting forward. Taken together, these facts mean that many players, once pressing optimally, feel like they are swinging across their body, pressing the arm across the trunk, and yet, physically, the arm is merely staying in-line with the trunk early in the swing.
Take a look at the two positions below. Neither elbow has yet cleared in front of the trunk, and yet both players are actively pressing. There is an active contraction through the pecs on both forehands. If there weren’t, the humerus would be stuck far behind the trunk, but instead, we see the elbow carrying right along with it.

In the positions above, the pecs are under tension, contracting to keep the arm moving forward with the trunk. Once the trunk starts to slow, about 50-100 ms before contact, that tension will fire the elbow past the trunk, into horizontal adduction, starting the racket’s final approach to the ball.
Upper Back Stability
If your upper back isn’t stable, you won’t have a solid base to press off of. Hold your elbow up using the muscles around your scapula, your lats, and the muscles on the side of your ribcage (serratus anterior). Isometric tone through that entire shoulder-complex prevents your elbow from falling down towards your body, and instead holds it up and away, where your chest has leverage to press forward.

This stability behind the shoulder, plus the active press in front of the shoulder, form the foundation of the Simplest Effective Forehand.
The Press is Tied to Rotation
It is extremely awkward to just press, without first spring-loading your chest using rotation, so even when trying to isolate and improve your pressing action, use a small turn to get it started.
Rotation is also the engine by which we press harder. Paradoxically, thinking about “pressing harder” will often make you press worse. The way to actually press harder is to rotate more explosively as you press. Doing so forces the pecs to contract harder in order to prevent the arm from lagging backwards, and then when your trunk slows, that energy gets delivered into the arm.

The Shoulder Lag Failure-Mode
As you twist forward, you should feel tension in your chest. That tension is necessary to force the hitting arm forward with the trunk. Without this tension, the hitting arm will lag backwards at the shoulder, dangling behind the trunk. It’ll then have to catch up right at the end of the swing, making the timing window minuscule.

Early, active contraction of the pecs prevents this. Again, it might feel like pressing your arm across your body, mimicking a chest-fly action, even when your elbow isn’t actually moving, and your press is just keeping the elbow in line until your trunk starts to slow.

behind it.
Different Press-Rotation Rhythms
Jannik Sinner generally presses earlier/harder with respect to his rotation than Casper Ruud does. The result is what you see below – Casper generally rotates more, and finishes farther around to his left, while Sinner generally finishes facing the net.

There are many right answers here. The most important part of the press slot is whether you can really feel it. There’s a spot out to your right, behind the ball, where you can press your arm into. (If you’re western, it might feel like flinging your elbow there, rather than your entire arm). Twist and press into that slot. When you get it right, your racket will fly through the ball.
Rotation is Early and Transient
The early part of your swing exists in service to the late part. Your early leg drive and torso rotation exist to accelerate the racket into a comfortable press slot, such that when you get to it, your arm can finish the swing. If you continue actively twisting past the press slot, that extra energy won’t get into your racket-head – it’ll just make the swing more difficult to time.
Physically, you will continue to rotate after the press-slot, but that rotation is passive, not active. The goal of your early rotation is to send the energy through your pecs and into your arm. Any rotational energy which doesn’t end up in your arm is wasted.

Motor Planning Your Pressing Action
Like almost everything in tennis, the press slot is a visual concept. Fire your early rotation and early pressing action based on the ball you’re seeing in front of you. Different balls demand different press slots. If the ball is lower, your press slot will be lower, and if it’s higher, your press slot will be higher (you’ll probably need to adjust your hand’s preparation height as well).

Right as the ball leaves your opponent’s strings, you should be developing at least a vague idea of where you want to intercept it, and how you want to strike through it. Your motor planning starts with your own anticipated contact, a kinesthetic visualization of how you want your racket head to smack through the ball.
Your pressing action is the link immediately upstream of that contact action. Press out behind the ball in a certain way, and your hand will do exactly what you imagined.

September 1, 2024
How conscious is this idea of pressing? How can we use weighted shadow swings to help better gain an athletic understanding of pressing? The up and through part of the shadow swing gives us the pressing, but how does one practice getting into the press slot off the court? I feel as though consciously thinking of how to rotate into a certain position, or push with the chest, will only hinder a player’s play.
September 12, 2024
Good question. You’re absolutely correct that thinking directly about these biomechanical concepts will bring mixed results while actually on court. For some, they might provide great insight, while for others, they might feel confusing and cause tension.
The key here is to use chest engagement as a guide. If you feel that part of your body firing as you end your swing, you’re getting it right, and if not, do some more contact point exploration, and experiment with different ways of throwing the weight out to the side until you get it firing.
For rotating the torso into a certain position, medicine ball work really helps. Specifically, the work should involve acceleration and deceleration. For example, throwing the medicine ball out to a partner (acceleration), but also stop the ball when it’s thrown to you (deceleration). Practicing that will help you habituate the feeling of rotating your torso accurately, without having to actually think about “rotating your torso accurately.”
I’ve had great results with students utilizing the weighted shadow swing. Your goal is to comfortably send the weight along a vector in space, and in order to do that, you’re going to have to throw it out behind that vector, such that it ultimately flies along it. One drill I’ve used that’s worked well with juniors still working on their mechanics: I’ll take a rubber line (the ones you put on the court to show kids where to stand) and hold it in the air, next to a ball I’m holding in the air. “Make the weight move through the ball along this line.” That almost always works. I’ll also have them stand somewhere, and then I’ll demonstrate by swinging the weight out in such a way that, at the end of the swing, it flies straight towards them. “See how that weight was going straight towards you?” Then, I stand somewhere, and I have them swing straight towards me. The point isn’t the exact exercise – the point is experimenting until you feel confident in your ability to have your swing end through a particular direction on command.
December 25, 2024
“I see many players fire their final pressing action too early, and a few fire it too late.”
Does this mean that for those final pressing action too early, they should wait until the racket lag is done, like the pictures shown?
December 27, 2024
Yes and no. I think that, literally, what you’re saying is correct, but from a subjective stand-point “wait until the racket lag is done” is not the cue I’ve had success with.
Instead, I have my students swing something heavy, like an iron plate, or a ball hopper. That lets them really feel their chest working. Once you’re feeling your chest engage, set up the swing such that you strike the ball right at the center of that chest-engaging-feeling. That way, if you’re a little early, or a little late, it’ll still feel good.