Cincinnati
| Year | Period | Type | Winner |
|---|---|---|---|
| 2016 | 15 Aug - 15 Aug | ATP | Marin Cilic |
| 2016 | 15 Aug - 15 Aug | WTA | Karolina Pliskova |
| 2015 | 16 Aug - 23 Aug | ATP | Roger Federer |
| 2015 | 17 Aug - 23 Aug | WTA | Serena Williams |
| 2014 | 10 Aug - 17 Aug | ATP | Roger Federer |
| 2014 | 11 Aug - 17 Aug | WTA | Serena Williams |
| 2013 | 11 Aug - 18 Aug | ATP | Rafael Nadal |
| 2013 | 12 Aug - 18 Aug | WTA | Viktoria Azarenka |
| 2012 | 13 Aug - 19 Aug | ATP | Roger Federer |
| 2011 | 15 Aug - 21 Aug | ATP | Andy Murray |
| 2011 | 15 Aug - 21 Aug | WTA | Maria Sharapova |
| 2010 | 16 Aug - 23 Aug | ATP | Roger Federer |
| 2010 | 09 Aug - 15 Aug | WTA | Kim Clijsters |
| 2009 | 17 Aug - 23 Aug | ATP | Roger Federer |
| 2009 | 10 Aug - 16 Aug | WTA | Jelena Jankovic |
| 2008 | 28 Jul - 23 Aug | ATP | Andy Murray |
| 2008 | 11 Aug - 17 Aug | WTA | Nadia Petrova |
| 2007 | 11 Aug - 19 Aug | ATP | Roger Federer |
| 2007 | 16 Jul - 22 Jul | WTA | Anna Chakvetadze |
| 2006 | 14 Aug - 21 Aug | ATP | Andy Roddick |
| 2005 | 15 Aug - 22 Aug | ATP | Roger Federer |
| 2005 | 17 Jul - 24 Jul | WTA | Patty Schnyder |
| 2004 | 02 Aug - 09 Aug | ATP | Andre Agassi |
| 2004 | 15 Aug - 22 Aug | WTA | Lindsay Davenport |
| 2003 | 11 Aug - 18 Aug | ATP | Andy Roddick |
| 2002 | 05 Aug - 12 Aug | ATP | Carlos Moya |
| 2001 | 06 Aug - 13 Aug | ATP | Gustavo Kuerten |
| 2000 | 07 Aug - 14 Aug | ATP | Thomas Enqvist |
| 1999 | 09 Aug - 16 Aug | ATP | Pete Sampras |
| 1998 | 10 Aug - 17 Aug | ATP | Patrick Rafter |
| 1997 | 04 Aug - 11 Aug | ATP | Pete Sampras |
| 1996 | 05 Aug - 12 Aug | ATP | Andre Agassi |
| 1995 | 07 Aug - 14 Aug | ATP | Andre Agassi |
| 1994 | 08 Aug - 15 Aug | ATP | Michael Chang |
| 1993 | 09 Aug - 16 Aug | ATP | Michael Chang |
| 1992 | 10 Aug - 17 Aug | ATP | Pete Sampras |
| 1991 | 05 Aug - 12 Aug | ATP | Guy Forget |
| 1990 | 06 Aug - 13 Aug | ATP | Stefan Edberg |
| 1989 | 14 Aug - 21 Aug | ATP | Brad Gilbert |
| 1988 | 15 Aug - 22 Aug | ATP | Mats Wilander |
| 1987 | 17 Aug - 24 Aug | ATP | Stefan Edberg |
| 1986 | 18 Aug - 25 Aug | ATP | Mats Wilander |
| 1984 | 20 Aug - 27 Aug | ATP | Mats Wilander |
| 1983 | 15 Aug - 31 Oct | ATP | Mats Wilander |
| 1982 | 17 Aug - 11 Jan | ATP | John McEnroe |
| 1982 | 16 Aug - 13 Sep | ATP | Ivan Lendl |
| 1980 | 18 Aug - 22 Dec | ATP | Harold Solomon |
| 1979 | 20 Aug - 09 Jul | ATP | Peter Fleming |
| 1977 | 11 Jul - 02 Jul | ATP | Harold Solomon |
| 1976 | 12 Jul - 14 Jun | ATP | Roscoe Tanner |
| 1975 | 29 Jul - 26 Jun | ATP | Tom Gorman |
| 1974 | 31 Jul - 29 Jul | ATP | Marty Riessen |
| 1973 | 06 Aug - 06 Aug | ATP | Ilie Nastase |
| 1972 | 31 Jul - 31 Jul | ATP | Jimmy Connors |
| 1971 | 02 Aug - 02 Aug | ATP | Stan Smith |
| 1970 | 20 Jul - 20 Jul | ATP | Ken Rosewall |
| 1970 | 01 Jan - 01 Jan | WTA | Na Li |