On this evening's radio news, the sports commentator said that Novak Djokovic could be "the first male tennis player to win 21 Grand Slams". In fact, that would be 21 major tournaments, each of which would have been a single leg of a clean sweep of all major tournaments, which is what a Grand Slam actually means. This flawed terminology has become a regular feature of commentary on tennis and golf, and for me somewhat devalues the achievement of anyone who has actually swept the boards.

wr