1999 | Cincinnati | Cincinnati Reds | 1999 in music | Australian Open | French Open | Cincinnati Bengals | Open University | open source | University of Cincinnati | U.S. Open | Cincinnati Masters | Wacken Open Air | Society of the Cincinnati | WKRP in Cincinnati | Space: 1999 | The Mummy (1999 film) | 1999 in film | The Open Championship | 1999 Pan American Games | Cincinnati Symphony Orchestra | U.S. Open (tennis) | 1999 ATP Tour | 1999 ICF Canoe Slalom World Championships | Ontario general election, 1999 | All England Open Badminton Championships | U.S. Open (golf) | Open Source | Open-pit mining | 2006 Australian Open |
The last occurrence of this had taken place at the 1999 Cincinnati Super 9 event, with Pete Sampras, Patrick Rafter, Andre Agassi and Yevgeny Kafelnikov all reaching the final four.