Vintage tennis memorabilia is at its most collectible when it comes from the major events associated with the Grand Slam (Wimbledon, U.S. Open, French Open, and Australian Open), or when it is connected to the greats of the game, both men and women. Racquets are the most sought after, followed by autographed programs (especially if signed by the champions) and other equipment (clothing, shoes, tennis balls) used in tournaments.