Tennis Strokes Wiki

Could this thing could really happen?
* Longest match time played by women: In 1984, Vicki Nelson-Dunbar defeated Jean Hepner in a Play a duration of 6 hours, 31 minutes 6-4, 7-6 (11). One point lasted 643 shots and 29 minutes. [6] 6 hours for two sets? what else his lady won the second set? they are professionals? http://en.wikipedia.org/wiki/Longest_tennis_match_records
Normally, I trust Wikipedia, but in that case, why did they not mention the tournament was in this game? I think that's a little strange
