Gavin MacMillan: He Fixed Sabalenka's Serve. Now He's Working With Coco Gauff

Gavin MacMillan spent years building athletes nobody expected to make it — boxers, hockey players, tennis pros. Then Aryna Sabalenka hired him, and the tennis world started paying attention.

In this episode, Gavin breaks down the serve transformation that took Sabalenka from 6 double faults in a single final to 6 double faults across an entire tournament. He explains why 99% of strength coaches in tennis are operating on the wrong principles — and why bigger, faster, stronger is the biggest lie in the sport.

He's now working with Coco Gauff. And he has thoughts.

🎾 WHAT WE COVER IN THIS EPISODE

→ Why conventional weight training is actively hurting tennis players

→ The Federer "toothpick" principle: how elasticity beats muscle

→ Sabalenka's serve rebuild — the real story, step by step

→ What Gavin is working on with Coco Gauff right now

→ Why you can't think your way through a serve under pressure

→ The coaching lie: "I played it, so I can teach it"

→ The broken ATP/WTA system — and why nobody's fixing it

→ Caro Garcia on what she'd change about her career if she started over

→ Why tennis is the single hardest sport in the world to succeed in professionally

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

⏱ CHAPTERS

01:00 Gavin's background — 7 sports, hockey, losing his mom at 15

02:00 Narcissistic tennis parents & the crystal ball problem

03:30 Why tennis is the hardest sport in the world to succeed in professionally

06:00 Tennis vs the fight business — the only comparable mental challenge

07:30 Inside boxing: weight cuts, Cotto vs Canelo, and the A-side

10:30 Why conventional weight training is destroying tennis players

12:00 Force vs power — the Soviet training science nobody in tennis is using

13:00 Federer's toothpick body vs Nadal — the real difference explained

15:00 The door analogy — why bigger muscles increase injury risk

18:00 Why there's almost no science in tennis coaching

20:00 Gavin's live analysis of Caro Garcia's game

22:00 Caro's shoulder injury & the 22,000 serves per year problem

25:00 The insane tennis calendar — no other professional sport does this

28:00 Instagram fitness coaches on tour & the science nobody uses

29:00 Technical flaws in the modern game — you cannot hide them anymore

32:00 Federer's on-the-run forehand & why Sampras would dominate today

35:00 The skills gap — why top players still can't execute the basics

37:00 Gavin joins Coco Gauff's team — his exact role

39:00 How long does it really take to change technique on a pro player?

42:00 Coco's serve numbers — the before and after

44:00 The Sabalenka serve transformation — the full story

47:00 The reps math — why "5-minute serve fixes" are for functional morons

48:00 What Freddie Roach taught Gavin about great coaching

51:00 One thing in the corner — simplicity under extreme pressure

56:00 The 70% first serve rule that made Sabalenka unbeatable

1:00:00 Advice to young players: what actually builds a career

1:01:00 The 85% rule — why going 100% loses Grand Slams

1:07:00 Women's tennis marketing — why the tour is failing its own players

1:11:00 Identity, mental health & living and dying with every point

1:18:00 The camera on Sabalenka after a loss — the tour's exploitation problem

1:22:00 Federer's parents — what Gavin learned meeting them at the Australian Open

1:24:00 Coco Gauff at 21 — changing her serve the week before the US Open

1:29:00 Caro: "I would have had a better team" — what she'd change about her career

1:31:00 Every athlete falls to their level of preparation — not one rises above it

1:34:00 George St-Pierre, stars aligning, and the luck factor in elite sport

1:37:00 The unlicensed conditioning industry — and why it's getting players hurt

1:40:00 Injury prevention: the right evaluation every player should have but doesn't

1:42:00 The serve biomechanics breakdown — why Rafter's motion damaged him and Federer's didn't

🎾 TENNIS INSIDER CLUB

The inside story of professional tennis — hosted by Caroline Garcia (former World No. 4, 2022 WTA Finals Champion)

Hosted on Acast. See acast.com/privacy for more information.