Tennis Glossary

1

1st Serve % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The percentage of first serves that land in the service box.

📡 The Signal

Reliability under pressure. A dip in 1st serve % often signals tension or fatigue before other stats show it.

🎯 Why It Matters

A higher first-serve percentage means fewer second serves, which are easier for the returner to attack. It's the gateway to free points.

⭐ Impact

4/5 — Key factor

📝 Example

Player hits 40 of 60 first serves in = 67% first-serve rate.

📏 How it's measured

First serves in ÷ total first serves attempted × 100.

🚧 Common Mistake

Equating a high 1st serve % with a good serve — accuracy without pace or placement is easily neutralised.

🔁 Related Terms

🏆 Practical goal

Consistently above 60%. Below 55% means too many second serves.

🛠️ How to improve it

Reduce serve speed by 10% and focus on placement. Practise serving under simulated pressure (e.g. score-based drills).

📊 Benchmarks

ATP60–65%

WTA58–64%

Junior50–60%

Club45–55%

🔤 Shorthand

1st In %

1st Serve Won % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The percentage of points won when the first serve lands in.

📡 The Signal

The quality of your first-serve weapon. High accuracy + high won % = a serve that genuinely hurts opponents.

🎯 Why It Matters

First-serve points are where servers have the biggest advantage. Winning a high percentage here creates a cushion for the inevitable tougher second-serve points.

⭐ Impact

5/5 — Decisive factor

📏 How it's measured

Points won on first serve ÷ first serves in × 100.

🚧 Common Mistake

Focusing only on aces — most first-serve points are won on the 2nd or 3rd shot, not the serve itself.

🔁 Related Terms

🏆 Practical goal

Above 65%. Below 60% means the first serve isn't generating enough advantage.

🛠️ How to improve it

Develop a reliable serve+1 pattern. Target specific locations on first serve rather than just hitting hard.

📊 Benchmarks

ATP70–80%

WTA65–75%

Junior55–65%

Club50–60%

🔤 Shorthand

1st Won %

2

2nd Serve % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The percentage of second serves that land in the service box.

📡 The Signal

Reliability under maximum pressure. A missed second serve is a double fault — the costliest error in tennis.

🎯 Why It Matters

Should be very high (85%+) since a missed second serve is a free point for the opponent.

⭐ Impact

3/5 — Meaningful factor

📏 How it's measured

Second serves in ÷ total second serves attempted × 100.

🚧 Common Mistake

Ignoring this stat because it's 'boring' — but consistency here prevents scoreboard damage.

🔁 Related Terms

🏆 Practical goal

Above 85%. Below 80% indicates a fundamental reliability problem.

🛠️ How to improve it

Build a go-to second serve with heavy spin. Groove it in practice until it's automatic under pressure.

📊 Benchmarks

ATP88–94%

WTA86–92%

Junior80–88%

Club75–85%

🔤 Shorthand

2nd In %

2nd Serve Won % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The percentage of points won when the player hits a second serve.

📡 The Signal

The true test of a server. Unlike first serve, there's nowhere to hide — second-serve quality separates levels.

🎯 Why It Matters

A weak second serve is the single biggest vulnerability in tennis. It's the moment where the returner has the best chance to take control.

⭐ Impact

5/5 — Decisive factor

📏 How it's measured

Points won on second serve ÷ second serves in × 100.

🚧 Common Mistake

Babying the second serve for safety — a slow, flat second serve is actually more dangerous than a well-spun one.

🔁 Related Terms

🏆 Practical goal

Above 50%. Below 45% means the second serve is being attacked too easily.

🛠️ How to improve it

Add spin (kick/slice) to create a higher bounce or wider angle. Practise second-serve patterns, not just the serve in isolation.

📊 Benchmarks

ATP50–58%

WTA46–54%

Junior40–50%

Club35–45%

🔤 Shorthand

2nd Won %

D

Double Fault % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The percentage of service points that result in a double fault.

📡 The Signal

Pressure leakage. Double faults spike when nerves rise — tracking the pattern reveals mental fragility on serve.

🎯 Why It Matters

Every double fault is a free point for the opponent, often at the worst possible moment. It's the serve equivalent of an own goal.

⭐ Impact

4/5 — Key factor

📏 How it's measured

Double faults ÷ total service points × 100.

🚧 Common Mistake

Treating all double faults equally — a DF at 40-0 is very different from one at 30-40.

🔁 Related Terms

🏆 Practical goal

Below 5%. Above 8% is a red flag requiring immediate attention.

🛠️ How to improve it

Develop a reliable spin second serve. Create a pre-serve routine that resets mental state after a fault.

📊 Benchmarks

ATP2–4%

WTA3–5%

Junior5–8%

Club6–12%

🔤 Shorthand

DF %

S

Serve Points Won % Serve Metrics ★ ★ ★ ★ ★

🖼️ What

The overall percentage of points won on serve, combining first and second serve outcomes.

📡 The Signal

The single best summary of serving effectiveness. If this number is above 60%, you're winning most service games.

🎯 Why It Matters

You need to win a majority of service points to hold serve consistently. This is the foundation metric for the serve game.

⭐ Impact

5/5 — Decisive factor

📏 How it's measured

(1st serve points won + 2nd serve points won) ÷ total service points × 100.

🚧 Common Mistake

Only looking at this number without breaking it down into 1st/2nd serve components.

🔁 Related Terms

🏆 Practical goal

Above 58%. Below 55% means you're under constant pressure on serve.

🛠️ How to improve it

Improve first-serve percentage OR second-serve quality — whichever is the weaker link.

📊 Benchmarks

ATP62–70%

WTA56–64%

Junior52–60%

Club48–56%

🔤 Shorthand

SPW %

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