Knee surgeons are as particular about their implants as professional tennis players are about their racquets.

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The outlets sell sporting goods and clothes, everything from Nike shoes and Reebok shirts to Wilson tennis racquets.

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Should U.S. tennis players only use Wilson racquets (which I believe are the only racquets made in the U.S.)?

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While it currently can be found in small items such as golf ball cores, tennis racquets, and skis, Apple probably have bigger plans.

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Other racket sports also emerged such as racquets, squash racquets, and eventually lawn tennis, which is widely credited to an Englishman, Major Charles Wingfield, who patented the equipment and rules for the game in London in 1874.

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The ball flew off their racquets, crisply.

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