NBL pacesetters Perth and Adelaide have each suffered a loss in the latest round, but continue to hold down first and second spots, respectively.
Sydney and Melbourne have proved the NBL is anything but a two-horse race after each upset one of the pacesetters.
The top four have a handy but not yet decisive break over the lower four with eight rounds left.
Perth (15-4) remain on top despite losing their unbeaten home record for the season on Friday after a 83-80 defeat at the hands of third-placed Melbourne.
Resurgent fourth-placed Sydney (9-8) stretched their winning streak to four on Sunday with a 105-93 home win over second-placed Adelaide (12-6).
Kings captain Ben Madgen scored 25, and Sam Young and Tom Garlepp made 21 each. All Garlepp’s points came in the second half.
Sydney shot at 54 per cent, while centre AJ Ogilvy was a towering defensive presence, recording a staggering eight blocks.
Ogilvy didn’t record a single field goal attempt, though he made seven of 10 free throws.
Daniel Johnson scored 28 and Gary Ervin 24 for Adelaide, who had 23 more field goal attempts and kept making runs at the Kings despite being down by 10 points or more on several occasions.
WA product Mark Worthington sealed the Tigers win in Perth with a last-gasp three-pointer.
He scored 12 of his match-high 24 points in the last quarter, while former Wildcat Chris Goulding added 23.
The Tigers shot 51 per cent from the field, while rookie centre Tom Jervis notched a career-high 21 for Perth.
Fifth-placed Cairns (8-11) maintained their recent dominance of bottom-of-the table Townsville (4-13) and stayed in finals contention with a 90-79 away win over the Crocs in the latest instalment of the Reptile Rumble.
Point guard Jamar Wilson scored 23 and added eight assists and seven rebounds, as the Taipans notched their sixth win in the past seven north Queensland derbies.
Brian Conklin scored 26 and Steven Markovic 21 for Townsville, who were pounded 38 to 19 on the boards as they slumped to a seventh straight loss. New Zealand (7-11) remained in the hunt for fourth with a 106-101 home win over Wollongong.
American point guard Kerron Johnson hit a match-high 21 for New Zealand, and sparked a decisive 10-point run to overturn a late deficit.
Tom Abercrombie and Gary Wilkinson each scored 20 for New Zealand, while Kevin Tiggs, Rotnei Clarke and Dave Gruber tallied 24, 23 and 21, respectively, for Wollongong.
Melbourne (12-8) moved three wins clear of Sydney with an 86-78 away victory over Wollongong (6-12).
Goulding scored 31 and Tommy Greer contributed 21 points and 11 rebounds for the Tigers, who overcame quarter and three-quarter-time deficits.