i raised this question in the haas b. federer thread:
btw, when was the last time a top 2 seed was defeated in the final by a WC? must have been ages...
but no-one has replied thus far and it might be a good idea for a thread. in an era almost totally dominated by the top players, what happened in halle today doesn't happen often but i guess that in the past it was more common. goran ivanisevic's 2001 wimbledon is the most notorious example, i guess.