In my recent entry, "Courier Finds His Inner Geek", I omitted a key word in describing qualifiication for the Champions Cup Series.
A competitor on this new 30-and-over circuit needs to have been in a Grand Slam final, not just a Grand Slam. Jim gently pointed this out to me in an e-mail, playing on my choice of words to note in typical deadpan fashion that qualifying via having merely played a major would have represented "casting a wide net" indeed!
Also, I ought to have made clear that a competitor must have played singles on a triumphant Davis Cup team. And that, regarding the third way to qualify, a player who has been in the Top Five in singles can get it (there are doubles rankings as well).
There are no further criteria.
Nothing more for me to have screwed up.
Now go out and buy tickets for the event to help get the egg off my face.