Sports played with spheres are easier to master than rectangular sports, such as Rubik's cubing and throwing bricks into windows. Circle fun with today's Groupon to Game-Set-Match, Inc., redeemable at two locations in Denver and Centennial. Choose between the following options:

• For $16, you get a Prince Premier racket stringing for 16, 17, or 18 gage rackets, which includes all supplies and labor (a $34.99 value).
• For $20, you get $40 worth of tennis supplies and apparel.
  
  

Game-Set-Match, Inc. caters to tennis players with speedy racket-stringing services alongside a sizable inventory of court-friendly apparel, equipment, and accessories. United States Racquet Stringers Association–certified stringers thread frames with a wide assortment of single-filament, multifilament, and blended strings. Every racket revitalization is finished within 24 hours, letting players return to lobbing volleys, aces, and misdirected pigeons in no time. Meanwhile, the tennis center's shelves abound with gear from brand names such as Babolat, Dunlop, and Adidas. Stock courtside armories or a canine birthday party with an armful of Wilson Grand Slam tennis balls ($7.99 for a three-pack), or don a Nike hat or visor to block the sun's angry glare from your serving motion ($15–$20). Court connoisseurs can also apply this Groupon toward a higher-value item, cutting the cost of a durable Prince EX03 tennis racket ($199.99) or a fashionable Whak Sak tennis backpack ($79.99).