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Logo for 'Germedream Slam Teenies' featuring two crossed tennis rackets with green and blue accents and a stylized headphone in green. The text is bold and white with black shadowing and multiple motion lines, and the background is black.
Logo for 'G greenery Slam Tensions' with two tennis rackets crossed above the text, which is written in green and black with a striped pattern.

Commack

214 Commack Rd.

Commack, NY 11725

631-499-6444

Miller Place

816 Route 25A

Miller Place, NY 11764

631-849-4190

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.

Three people standing inside a tennis shop with various tennis rackets and gear displayed on the walls. They are smiling, and the woman in the middle is holding tennis rackets. The shop has Wilson and Babolat brands prominently displayed.

Expert Customer Service

A display of tennis rackets and sports equipment on a store wall, with tennis balls and tennis rackets on a table in the foreground.

Massive Racket Selection

Display of tennis shoes on shelves inside a sports store with banners and advertising for tennis brands like HEAD and Asics.

Unbeatable Apparel

A person adjusting wires on a tennis racket with an electronic stringing machine.

Same-Day Stringing

Neatly organized tennis rackets with blue, green, yellow, and red accents inside a cardboard box.

Custom Demo program

Multiple golf clubs with black, gray, and white grips organized in rows on a wooden surface, with colorful head covers and packaging visible in the background.

Pickleball & Badminton Gear

Gift Cards

Gift Cards

A blue Yonex tennis bag with black zippers and the Yonex logo, a tennis racket with a black handle and a blue frame, and three yellow tennis balls.

Send a gift directly to a friend!

GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD GIFT CARD
GIFT CARD
from $25.00

Send a gift directly to a friend!

What’s in Store?

View fullsize New Men's warm up suits just arrived! #tennis #grandslamtennisny #Nike
View fullsize Look Good, Feel Good, Play Good! #Grandslamtennisny #tennis
View fullsize Are your tennis shoes ready? #Grandslamtennisny #tennis
View fullsize Gear check! #grandslamtennisny #tennis
View fullsize Nothing like a quick “visit dad at work”! Of course Declan has to steal a racquet before he leaves… #grandslamtennisny
View fullsize Happy birthday Bailey! 5 years has gone too fast!! #grandslamtennisny
View fullsize 🎾 Gear Check! Strings? Grips fresh? Shoes have holes? New racquet? What about a bag? Take a few minutes to tune up your equipment before the school tennis season! #grandslamtennisny #tennis #school #tennisteam
View fullsize Give the gift of tennis this holiday. Racquets for all ages! #holidays #grandslamtennisny #tennis
View fullsize This Holiday, Serve with Style #grandslamtennisny #tennis #holidays #pickleball
View fullsize Don’t guess the size, guarantee the fit! Grand Slam Tennis fits the whole family for the holidays! #holiday #grandslamtennisny #tennis #pickleball #courtshoes
View fullsize Tennis or Pickleball? Which will Bailey choose? At Grand Slam Tennis we Choose BOTH! #holiday #grandslamtennisny #pickleball #tennis
View fullsize Don’t guess their gear, let them choose! Shop gift certificates in-store/online at grandslamtennisny.com #holidays #grandslamtennisny #tennis #pickleball
View fullsize Stop juggling your holiday options! We have the perfect tennis stocking stuffers ready… #grandslamtennisny #tennis #holiday #pickleball
View fullsize Stop juggling your options, Pick a ball at Grand Slam Tennis this holiday season! #grandslamgiftgivingguide2025 #grandslamtennisny #holidays #tennis #pickleball
View fullsize Happy Thanksgiving from our family to yours! Much to be thankful this year! #grandslamtennisny #family #thanksgiving
View fullsize Need your ball machine repaired or serviced? Give us a call! We specialize in sports tutor, lobster, and spinshot. #grandslamtennisny #ballmachine #tennis
View fullsize #prime #time US Open 2025 #grandslamtennisny #head
View fullsize Wow. The spirit of the Rafa’s tenacity lives on in the #nextgen…..Carlos Alcarez!!! #never #give #up #grandslamtennisny
View fullsize Happy Mothers Day to all you special moms out there! I know our family got a special one!! #happymothersday❤️ #grandslamtennisny
View fullsize Now offering 24 hr racquet drop off/pick-up service in both locations (Commack/Miller Place)! #grandslamtennisny #tennis #24 #service
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Get Ahead of the Game

Book Stringing Appointment
Return a Demo Racket

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.