I'm guessing one could call it something like:
"SPOILERS: Agassi vs. Haehnel"
and just leave the subject line like that. Those that don't want to know the result, don't really know from reading the subject line (for all they know it could be a thread worshipping Agassi's form in that match). In any case, it's vague enough and yet we have a good idea of what it's about. Those who saw the match or saw the news headlines can put two and two together, while those that are stuck on tape delay but came on the forums anyways can be spared the news for the meanwhile. Obviously, those that don't want to read whatever it would have to say yet, don't have to read it.
I can understand a person being emotional or upset or whatever about it and posting about it asap... But for future reference...