Supposedly, in 1717, Bach challenged French harpsichordist, Louis Marchand to a keyboard duel. The contest never took place, however, as Marchand failed to show up on the prescribed duel day. As celebrated as Marchand may have been in the French keyboard style, the amazing Bach was up-to-speed in not only the German style, but also in the Italian, English and yes, French performance styles of the day.
Pretty amazing for a guy who never left his German homeland!