Ajax, Andy Bay Kavanagh and the South Pac Magic are all tied atop the table on six wins with two games remaining.
That came as a result of wins to Ajax and South Pac on Tuesday night.
Ajax claimed a comfortable 71-43 victory over the Andy Bay Falcons, starting well and extending its lead throughout the game.
Both sides were without key players - Nicole and Aleisha Ruske for Ajax and Zoe Richards for the Falcons - but Ajax covered for its losses better.
Natalie Smith poured in 26 points, while Olivia O'Neill added 17 for the defending champion.
The Magic claimed its fifth consecutive win as it edged Varsity 58-50.
The game remained even throughout and the Magic led 41-38 heading into the final quarter.
From there it was able to finisher more strongly, pulling away to open the gap in the fourth.
Letitia Mullaly top-scored for the Magic with 16 points, while Tara Clement had 19 for Varsity.
Kavanagh had its second loss of the season last week.
It was beaten 72-58 by South Pac OGHS, the sides meeting during the competition's university break instead of on Tuesday.
