USTA P1 Certified · Los Altos, CA

The game reveals
who you are

Private tennis coaching built on 20 years of competitive experience. I don't take every student. I take the ones ready to work.

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P1
USTA Certification
Highest Level
20+
Years Competitive
Experience
100
Career High School
Singles Victories
No. 6
USTA National
Junior Ranking
Coaching Philosophy

I coach players,
not forehands

Every player who walks onto my court has a game inside them that's uniquely theirs. My job isn't to rebuild you in someone else's image. It's to find what's already there and make it unshakable.

I come from competitive tennis — nationally ranked juniors, NCAA Division I, the professional circuit. I know what it takes because I've lived it. And I know the difference between a coach who teaches technique and one who develops a competitor.

That's what I do. I develop competitors.

The best coaching relationship is one where the player eventually doesn't need you — but always wants you in their corner.
— AJ Kerin
The Approach

Three pillars of development

01

Technical Precision

Biomechanically sound fundamentals tailored to your body and your game. Not one-size-fits-all instruction — engineered strokes that hold up under match pressure.

02

Competitive Intelligence

Reading the opponent, managing momentum, understanding when to attack and when to construct. The mental architecture that separates club players from competitors.

03

Parent Partnership

For junior players: I work with the whole family. Parents learn how to support the player's development without creating pressure. We're a team — player, coach, family.

Training Programs

Select your path

Foundation

Developing Players
  • Weekly private sessions
  • Stroke development & refinement
  • Match play fundamentals
  • Monthly progress assessment
  • Tournament guidance
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Elite

By Invitation Only
  • Intensive daily training blocks
  • Full competitive season planning
  • College recruitment guidance
  • Mental performance work
  • 24/7 coach access
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Begin Here

Apply to train with AJ

I keep my roster intentionally small. Tell me about the player, the goals, and the commitment level. If it's the right fit, I'll reach out within 48 hours.

Applications are reviewed personally by AJ. Expect a response within 48 hours.

Application Received

Thank you. AJ will review your application personally and reach out within 48 hours if it's the right fit.

AJK
About AJ

Anthony John Kerin IV

AJ grew up on the courts of Saratoga, California, where he became one of the top-ranked junior players in the nation — reaching No. 6 in USTA Boys 14s and earning High School All-American honors with 100 career singles victories at Saratoga High.

He competed at the NCAA Division I level at Santa Clara University and Fresno State before beginning his coaching career. Over two decades, he's trained nationally ranked juniors, built private training programs, and earned the USTA's highest coaching certification — the P1 license.

Based on the Peninsula, AJ specializes in developing serious competitive players through private, selective coaching relationships. He also co-founded AJ Tennis Academy International, a nonprofit dedicated to expanding tennis access worldwide.

Alma Mater
Santa Clara · Fresno State
Certification
USTA P1 (Highest)
Base
Los Altos, California
Specialty
Competitive Development

Ready to start?

For inquiries, reach AJ directly.

ajktennis@gmail.com
Los Altos · Menlo Park · Peninsula, CA