Train Hard. Stay Sharp. Dominate This Winter.
Winter Tennis Lessons
Don’t let the cold slow your game — train with purpose this winter through Flattline Tennis Lessons built for youth athletes ready to level up.
Lessons in collaboration with Marinette Rec Center
Winter Group Lessons
Beginner
New to tennis? Our Beginner Group Lessons focus on the core fundamentals — grip, footwork, stroke technique, and rally basics — all in a fun, supportive environment. Build confidence and consistency from day one. Click Enroll Now to find out more!
Note: All levels contain five sessions
Intermediate
Already know the basics? Take your game up a level with focused drills, improved consistency, and real match play strategy. Perfect for players ready to compete with confidence. Click Enroll Now to find out more!
Advanced
Designed for serious players aiming for varsity or tournament success. These sessions push your limits with high-intensity drills, advanced strategy, and personalized feedback. Click Enroll Now to find out more!
Frostline Highschool Tennis Camp
Frostline Highschool Tennis Camp
Ready to take your tennis game to the next level? Join the Frostline High School Tennis Camp — a four-day winter camp built for dedicated high school athletes. Click “Enroll Now” to learn more!
Winter Private Lessons
3 Private Lessons
Take your game to the next level with private lessons from Anton Flatt, owner and head coach of Flattline Tennis. Enjoy three personalized one-hour sessions, scheduled flexibly based on court and instructor availability.
5 Private Lessons
Take your game to the next level with private lessons from Anton Flatt, owner and head coach of Flattline Tennis. Enjoy five personalized one-hour sessions, scheduled flexibly based on court and instructor availability.
Adult Lessons
Group Lessons — $60
Develop your skills through five sessions of forty-five minutes that help everyone progress through their tennis journey.
3 Private Lessons — $50
Take your game to the next level with private lessons from Anton Flatt, owner and head coach of Flattline Tennis. Enjoy three personalized one-hour sessions, scheduled flexibly based on court and instructor availability.