Commack
214 Commack Rd.
Commack, NY 11725
Miller Place
816 Route 25A
Miller Place, NY 11764
The Tennis Store
with the Personal Touch
Whether you’re new to the game or a seasoned pro - we’ve got you covered. With the latest gear and over 40 years of expertise, Grand Slam is your go-to for all things tennis.
Expert Customer Service
Massive Racket Selection
Unbeatable Apparel
Same-Day Stringing
Custom Demo program
Pickleball & Badminton Gear
Gift Cards
Gift Cards
Send a gift directly to a friend!
Get Ahead of the Game
Coaching Resources
With a focus on video analysis and analytics, the guys at TennisTech will take your game into the 21st century.
SCJTL provides Suffolk County youth opportunities to learn and play tennis with friends and peers. They offer quality tennis programs that are accessible, affordable and fun.
The Grand Slam Story
Jim Donnelly has been the proud owner and operator of Tennis Emporium & Grand Slam Tennis for over 42 years. Grand Slam Tennis was opened in 1986 after the birth of Jim's youngest son, Chase, who is currently his business partner. An owner can always be found in either location, as Chase operates the Commack Store and Jim, Miller Place. We are proud to be a customer-friendly store and have recently expanded our brand by opening a second location in Miller Place.