Racket is the standard spelling of the word. racquets is an alternative spelling used more commonly in certain sports (squash, racquetball, badminton) and less commonly in others. The International Tennis Federation uses racket exclusively. How much does Federer's racket cost? Federer's endorsed racquet, the Wilson Pro Staff RF 97, is one of the priciest racquets on the market. With a custom paint job, the price can push $300. However, you can buy a lower end Wilson racquet for around $30.