Adidas has been involved with tennis equipment since the mid 1960s and has historically sponsored many top tennis players, beginning with two of the most dominant male tennis players at the start of the professional era in the late 1960s, Stan Smith and Ilie Nastase. During the 1980s and 1990s, not only were they exclusive apparel and footwear sponsors of world number one men's tennis players Ivan Lendl and Stefan Edberg and ladies' world number one Steffi Graf but each player had their own, exclusive graphic styles designed for their use during play, which were in turn marketed to the general public. Ivan Lendl even spent the vast majority of his dominant career playing with several different models of Adidas tennis racquets, primarily using the legendary Adidas GTX-Pro and then later the Adidas GTX Pro-T. The company recently introduced a new line of tennis racquets. While the Feather is made for the "regular player", and the Response for the "club player", Adidas targets the "tournament player" with the 12. 2 oz Barricade tour model.