Beyond Speed: 3 Tennis Playing Styles to Train Against During the US Open

The fastest shots at the US Open attract the biggest reactions. Serve speeds, explosive forehands and rapid baseline exchanges make power look like the defining test of modern tennis.

But speed is only one way an opponent can disrupt your game.

A low slice can take away your preferred contact point. Changing placement can prevent you from fully recovering. A shift in spin can make two balls travelling at a similar speed behave completely differently after the bounce.

Tenniix brings these forms of match pressure into opponent-style training through three distinctive profiles: Maren (Slice Type), Jett (Placement Type) and Knox (Spin Type). Maren changes the height and pace of the ball. Jett changes your position on court. Knox changes what happens after the bounce. Together, they help players prepare for more than pace alone.

Below, we break down three Tenniix playing styles—Maren, Jett and Knox—explaining how each changes the incoming ball, what adjustment it demands from the player, and why that matters in match play.

Why Training Only for Speed Leaves a Gap

Increasing speed is an easy way to make a tennis ball machine drill feel demanding, but faster does not always mean more realistic. You may be comfortable against a hard hitter because the incoming pace gives you rhythm, yet struggle against an opponent who gives you little pace, keeps the ball low or changes the bounce.

If every ball machine session uses a similar trajectory, rhythm and bounce, you may become reliable under one familiar condition without becoming more adaptable in a match.

That is where opponent-style training becomes more useful than another increase in speed. Instead of giving you one familiar feed at a harder setting, Tenniix lets you choose the type of pressure you want to practise against. The machine is no longer asking only, "Can you hit this ball?" It is asking, "Can you adjust when the ball changes?"

Maren (Slice Type): The Rhythm Breaker

Slice Type

Keeps the ball low. Takes away your comfortable contact point.

The difficulty becomes clearer after the bounce. Instead of rising into a comfortable strike zone, the ball stays low and requires you to adjust your spacing, lower your body and generate more pace. Attack too early and contact becomes rushed; wait too long and the ball drops even farther.

At the US Open, slice may not produce the final highlight, but it can interrupt a fast baseline exchange, change an opponent's contact point and break an established rhythm.

Training against Maren develops your ability to:

• Recognize backspin and adjust your spacing and body position;
• Generate controlled pace from a slower incoming ball;
• Decide when to stay patient and when the ball is genuinely attackable.

Repetitive practice may reinforce your preferred contact point without preparing you for the ball that takes it away. Maren lets Tenniix Pro users practise that adjustment through AI Simulation and review a challenge report when the reporting conditions are met.

Jett — The Court Mover

Placement Type

Pulls you out of position and tests what happens next.

Jett is a placement-driven playing style, available in Head-to-Head Mode on both Tenniix Basic and Pro for tennis, as well as Tenniix Basic for pickleball.

Its patterns combine wide directional changes with deeper and shorter feeds. The pressure accumulates as each ball changes the position from which you must play the next one. The real test is whether you recover, regain balance and reach that ball in a position to produce another useful shot.

This is also what makes court coverage at the US Open so demanding. A final error may look technical, but the stroke often breaks down because the player arrives late, hits while off balance or has not recovered from the previous shot.

Jett trains you to:

• Move into position before committing to the stroke;
• Maintain balance and useful shot quality while being moved;
• Recover after contact and adjust between lateral and forward movement.

The goal is not simply to reach every ball, but to preserve return quality as your position changes. A standard feed can build confidence from one location; Jett reveals whether that confidence survives movement. Its fixed Head-to-Head patterns also let you repeat the same positional challenge without relying on a hitting partner.

Knox — The Spin Disruptor

Spin Type

Same speed. Different spin. Completely different bounce.

Knox is a spin-driven playing style that dynamically changes spin type and intensity while keeping ball speed at a moderate level.

That makes the bounce the central part of the challenge.

A stronger topspin ball may rise above your preferred contact point, while another change in rotation can alter the bounce height or lateral movement. If you prepare only according to pace, you may end up too close, too far away or committed to the wrong contact height.

Knox develops your ability to:

• Recognize changes in spin before and immediately after the bounce;
• Adjust spacing, contact height and swing timing with your feet;
• Avoid using the same preparation and rhythm for every incoming ball.

Two rally balls can look similar but demand different responses after they land. A repetitive drill can make the bounce predictable; Knox keeps spin recognition and adjustment at the center of the session, giving spin control a clear match-training purpose.

Three Tennis Playing Styles, Three Different Problems

Maren, Jett and Knox are not three difficulty levels of the same drill. Each takes away a different form of comfort.

Choose the style that matches the condition most likely to destabilize your game: low contact, movement away from the center or an unpredictable bounce.

How These Playing Styles Work in Tenniix

All three playing styles include LV1, LV2 and LV3 difficulty options. The available format and machine compatibility depend on the selected style.

*A challenge report is not generated when fewer than three balls have been delivered and the challenge lasts less than 10 seconds.

Maren uses a 20-ball AI Simulation challenge on Tenniix Pro. Jett and Knox use fixed landing points and ball paths in adjustable six-ball sets in Head-to-Head Mode, without score calculation or a challenge report. "Opponent-style training" describes the pressure created on court; it does not mean that every style uses the same operating logic.

Our previous article introduced other Tenniix Pro AI opponent profiles and vision-based rally play. Read Why Vision Changes Tennis Training: Tenniix Pro's Visual System Delivers True Rally Play to learn more.

Turn US Open Viewing into Three Focused Training Sessions

The next time you watch a US Open match, look beyond the fastest serve or biggest forehand.

Watch what happens when the rhythm changes.

Then bring that pressure into your own training.

• Maren: Complete one 20-ball AI Simulation challenge, control the low ball and review the resulting report.
• Jett: Complete the default 18-ball session while prioritizing recovery and return quality.
• Knox: Complete three sets while reading the bounce and adjusting your spacing before adding pace.

Identify which pressure makes your game less reliable, then revisit it with purpose.

Which Tenniix Fits Your Training?

Jett and Knox bring placement- and spin-based opponent patterns to Tenniix Basic and Tenniix Pro for tennis, as well as Tenniix Basic for pickleball. That means Basic users can move beyond a single predictable feed and practise repeatable changes in court position and spin.

For players who want to go further, Tenniix Pro adds Maren through AI Simulation: a 20-ball challenge against slice-based pressure with a report generated after an eligible session.

The choice is not simply about more settings. It is about how far you want solo practice to move toward opponent-style match preparation.

Frequently Asked Questions

• What is the difference between Maren, Jett and Knox in Tenniix training?

  Maren uses slice to keep the ball lower and slower, Jett changes placement to test movement and recovery, and Knox changes spin to challenge how you read and adjust to the bounce.

• Do I need Tenniix Pro to train against all three playing styles?

  Yes, for access to all three. Jett and Knox support Tenniix Basic and Pro for tennis and Tenniix Basic for pickleball. Maren's AI Simulation is exclusive to Tenniix Pro for tennis.

• How many balls are included in Head-to-Head Mode?

  Each set contains six balls. A session runs three sets by default, for 18 balls in total, and the number of sets can be adjusted.

• Does every Tenniix playing style generate a challenge report?

  No. Among these three styles, only Maren runs in AI Simulation and can generate a challenge report. Jett and Knox use Head-to-Head Mode and do not generate reports.

Do Not Make Every Session Harder. Make It Different.

The US Open shows what happens when a player cannot adjust quickly enough. Your next opponent may keep the ball low, move you away from your preferred position or change the bounce with spin. Tenniix gives you a way to meet those problems before match day.

Choose Tenniix Basic to bring placement- and spin-based opponent patterns into regular practice, or step up to Tenniix Pro for AI Simulation with Maren and post-challenge reporting.

Do not wait for an unfamiliar playing style to expose the gap in your training. Practise the adjustment before you need it.