The Open category for men and women in the Western Australian Basketball League (WABL) is commonly and coequally known as Division 1 or D-League. Traditionally, teams at this level are made up of bench players and extended squad members of NBL1 West teams, formerly State Basketball League (SBL).
The competition was known as WABL Division 1 from as early as the mid 1990s until 2008. After a year known as WABL Open Men and Women in 2009, the competition was known as WABL D-League from 2010 to 2016.
In 2017, with the inclusion of Geraldton Buccaneers and Goldfields Giants in the men’s competition, the name SBL Division 1 was introduced while still under the WABL banner. A Goldfields Giants women’s team was entered for the first time in 2018.
In 2020, following the cancellation of the SBL season, the “SBL Division 1” name was dropped and “D-League” was reintroduced as a placeholder name in a COVID-affected year.
In 2021, the league looked to align a ‘Championship’ brand from Under 12s to Open Age. As such, the competition was branded as WABL Championship Men and Women. More can be read on this here.
In 2026, the competition became known as the TCD Open Championship.
As of July 2026
**Records from 1995 are the earliest known results**
Women’s Champions
| Year | Champion | Runner Up | |||
| 1995 | Stirling Senators | 55 | defeated | Willetton Tigers | 53 |
| 1996 | Willetton Tigers | 73 | defeated | Lakeside Lightning | 56 |
| 1997 | Willetton Tigers | 61 | defeated | Lakeside Lightning | 56 |
| 1998 | Willetton Tigers | 54 | defeated | Stirling Senators | 50 |
| 1999 | Perry Lakes Hawks | 54 | defeated | Perth Redbacks | 50 |
| 2000 | Perry Lakes Hawks | 60 | defeated | Wanneroo Wolves | 58 |
| 2001 | Willetton Tigers | 66 | defeated | Perth Redbacks | 42 |
| 2002 | Cockburn Cougars | 71 | defeated | Willetton Tigers | 56 |
| 2003 | Cockburn Cougars | 71 | defeated | Mandurah Magic | 51 |
| 2004 | Cockburn Cougars | 52 | defeated | Willetton Tigers | 42 |
| 2005 | Willetton Tigers | 50 | defeated | Cockburn Cougars | 44 |
| 2006 | Unknown – records lost | ||||
| 2007 | Wanneroo Wolves | 76 | defeated | Perth Redbacks | 41 |
| 2008 | Perth Redbacks | 57 | defeated | Wanneroo Wolves | 48 |
| 2009 | Perry Lakes Hawks | 55 | defeated | Lakeside Lightning | 46 |
| 2010 | Perry Lakes Hawks | 60 | defeated | Perth Redbacks | 51 |
| 2011 | Cockburn Cougars | 59 | defeated | Perth Redbacks | 53 |
| 2012 | Perth Redbacks | 63 | defeated | Perry Lakes Hawks | 60 |
| 2013 | Lakeside Lightning | 64 | defeated | Stirling Senators | 55 |
| 2014 | Willetton Tigers | 53 | defeated | East Perth Eagles | 50 |
| 2015 | Cockburn Cougars | 56 | defeated | Stirling Senators | 53 |
| 2016 | Perth Redbacks | 72 | defeated | Stirling Senators | 61 |
| 2017 | Mandurah Magic | 72 | defeated | Perth Redbacks | 63 |
| 2018 | Lakeside Lightning | 77 | defeated | Perry Lakes Hawks | 69 |
| 2019 | Perry Lakes Hawks | 81 | defeated | Warwick Senators | 64 |
| 2020 | Warwick Senators | 85 | defeated | Kalamunda Eastern Suns | 58 |
| 2021 | Lakeside Lightning Purple | 66 | defeated | Goldfields Giants | 57 |
| 2022 | Perry Lakes Hawks | 77 | defeated | Willetton Tigers Blue | 67 |
| 2023 | Perry Lakes Hawks | 71 | defeated | Cockburn Cougars | 66 |
| 2024 | Perry Lakes Hawks | 49 | defeated | Mandurah Magic | 47 |
| 2025 | Cockburn Cougars | 100 | defeated | Perry Lakes Hawks | 64 |
| 2026 | Cockburn Cougars | 78 | defeated | Warwick Senators | 63 |
Men’s Champions
| Year | Champion | Runner Up | |||
| 1995 | Lakeside Lightning | 93 | defeated | Cockburn Cougars | 80 |
| 1996 | Wanneroo Wolves | 80 | defeated | Perry Lakes Hawks | 67 |
| 1997 | Wanneroo Wolves | 104 | defeated | Perry Lakes Hawks | 78 |
| 1998 | Perry Lakes Hawks | 91 | defeated | Lakeside Lightning | 64 |
| 1999 | Lakeside Lightning | 56 | defeated | Perth Redbacks | 55 |
| 2000 | Perry Lakes Hawks | 75 | defeated | Lakeside Lightning | 57 |
| 2001 | Perry Lakes Hawks | 79 | defeated | Willetton Tigers | 76 |
| 2002 | Willetton Tigers | 93 | defeated | Lakeside Lightning | 63 |
| 2003 | Lakeside Lightning | 65 | defeated | Willetton Tigers | 63 |
| 2004 | Lakeside Lightning | 69 | defeated | Willetton Tigers | 59 |
| 2005 | Perth Redbacks | 59 | defeated | Lakeside Lightning | 47 |
| 2006 | Lakeside Lightning | 61 | defeated | Perth Redbacks | 51 |
| 2007 | Lakeside Lightning | 87 | defeated | Cockburn Cougars | 59 |
| 2008 | Perry Lakes Hawks | 93 | defeated | Kalamunda Eastern Suns | 71 |
| 2009 | Perry Lakes Hawks | 84 | defeated | Wanneroo Wolves | 75 |
| 2010 | Perry Lakes Hawks | 77 | defeated | Lakeside Lightning | 74 |
| 2011 | Wanneroo Wolves | 73 | defeated | Cockburn Cougars | 61 |
| 2012 | Wanneroo Wolves | 86 | defeated | Willetton Tigers | 70 |
| 2013 | Lakeside Lightning | 78 | defeated | Perth Redbacks | 69 |
| 2014 | Perry Lakes Hawks | 87 | defeated | Willetton Tigers | 75 |
| 2015 | Joondalup Wolves | 68 | defeated | Perth Redbacks | 62 |
| 2016 | Lakeside Lightning | 90 | defeated | East Perth Eagles | 66 |
| 2017 | Perry Lakes Hawks | 95 | defeated | East Perth Eagles | 76 |
| 2018 | Joondalup Wolves | 71 | defeated | Kalamunda Eastern Suns | 68 |
| 2019 | Lakeside Lightning | 71 | defeated | Joondalup Wolves | 66 |
| 2020 | Willetton Tigers | 83 | defeated | Perry Lakes Hawks | 72 |
| 2021 | Perry Lakes Hawks | 82 | defeated | Lakeside Lightning | 67 |
| 2022 | Cockburn Cougars | 90 | defeated | Perth Redbacks | 82 |
| 2023 | Willetton Tigers | 97 | defeated | Perth Redbacks | 82 |
| 2024 | Perry Lakes Hawks | 77 | defeated | Willetton Tigers | 74 |
| 2025 | Willetton Tigers | 107 | defeated | Warwick Senators | 99 |
| 2026 | Lakeside Lightning | 94 | defeated | Willetton Tigers | 81 |