Jean-Christophe Verbourg, international tour director at Babolat, isn't so sure that poly strings need lower tensions.

WSJ: Roger Federer: With Tennis Rackets, He Strings Them Loose

Mr. Babolat isn't about to set limits on what the racket might do in the future.

WSJ: Babolat Microchip Racket: The Racket of the Future

"In five, 10, 20 years, tennis without data will not be possible, " said Eric Babolat, the company's CEO.

WSJ: Babolat Microchip Racket: The Racket of the Future

Nadal has lucrative deals with Nike, Bacardi, Babolat and Kia Motors.

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Nadal has Nike, Kia Motors and Babolat in his stable.

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It won't be sold until next year, and Babolat hasn't let anyone other than stars like Rafael Nadal, Kim Clijsters and Li Na (the defending French Open champion), hit with it.

WSJ: Babolat Microchip Racket: The Racket of the Future

That's where, just maybe, Babolat comes in.

WSJ: Babolat Microchip Racket: The Racket of the Future