I was watching a tape of the 1980 U.S. Open final between Borg and McEnroe and noticed that Borg was using his Donnay Borg Pro racquet. I thought Borg had always used his Bancroft Borg Personal racquet when he played in the U.S., and only used the Donnay when he played outside of the U.S.? That's the way I thought I had remembered it. So when did Borg stop using the Bancroft and why? Did Bancroft cancel his contract? Did he ever go back to using the Bancroft before he retired?