With just two regular rounds left in Season 11, a vital upset for Belmont over Hamilton has blown the race for first place wide open, as the Stags fall back into the four-way battle at the top of the standings.
The Beavers claimed a key 10-3 win over the defending champions to move back within just two points of a top two finish, and a vital quarter-final bye for the looming playoffs, after early dominance choked an under-manned Hamilton out of the game.
Key moments came from Jaimi Bubb on the win as he collected two MVP points for his squad, and an ordered and controlled set-up from Belmont proved key as they entered the half-break with a strong lead, an advantage they would see out to the end of the match.
The Stags' defeat also sets up a blockbuster match-up in the second last regular season round - Hamilton will take on Shortland in the battle for first place, with both teams sitting on a level 30 points and the defending champions leading only on a superior set difference.
The winner-takes-all fixture comes after Shortland secured a 14-2 win over Bar Beach on Thursday evening, to keep themselves on pace for a potential top two finish in their first season in the league.
Also on Thursday evening, Waratah warded away a Raymond Terrace challenge to win 9-4, remaining level with the victorious Beavers, while Cooks Hill earned their second win of the season over Kotara, 9-8.
STANDINGS: Hamilton, Shortland (32), Belmont, Waratah (30), Raymond Terrace (20), Kotara (18), Cooks Hill (16), Bar Beach (14).
RD4: Shortland stay undefeated with fourth win (22/03)
RD3: Hamilton claim revenge in grand final rematch (15/03)
RD2: Bar Beach hold off Glendale to bag first win (08/03)
RD1: Waratah sweep aside arch-rivals with major margin (01/03)
PRESEASON: Season 12's draw & key fixtures revealed (08/02/19)
PRESEASON: Rego now open for NDL Season 12. (01/02/18)
GF: Belmont edge out Hamilton in two-set grand final epic (16/11)
FINALS: Hamilton and Belmont set up grand final rematch (9/11)
RD14: Waratah down Belmont in heated one-set thriller (2/11)
RD13: Shortland oust Hamilton from first with one to go (26/10)
RD12: Belmont upset Hamilton to blow first place race open (19/10)
RD11: Shortland take second after thriller against Belmont (12/10/18)
RD10: Waratah tumble into fourth place after slow start (5/10/18)
RD9: Top four teams hold off finals-hopefuls (28/09/18)
RD8: Hamilton claim first as league celebrates Ladies Day (21/09/18)
RD7: Shortland and Kotara clash goes down to the wire (14/09/18)
RD6: Waratah keep close on Hamilton's heels (07/09/18)
RD5: Hamilton prevail in grand final rematch (30/08/18)
RD4: Belmont tumble into ladder mix with defeat (24/08/18)
RD3: Waratah cuts Shortland's undefeated streak short (17/08/18)
RD2: Shortland break Terrace to continue strong start (10/08/18)
RD1: Waratah open account against long-standing rivals (03/08/18)
PRESEASON: Season 11's draw & key fixtures revealed (19/07/18)
PRESEASON: Registrations now open for NDL Season 11. (13/07/18)
GF: Hamilton extend dynasty with fifth championship (06/07/18)
SF: Belmont punch ticket to season decider with comeback (29/06/18)
QF: Raymond Terrace scores maiden finals victory (22/06/18)
RD15: Waratah confirm second place, first week bye (15/06/18)
RD14: Waratah steady the ship with key three-set win (08/06/18)
RD13: Belmont ensures the Waratah slide continues (01/06/18)
RD12: Cooks Hill and Belmont remain level with draw (25/05/18)
RD11: Waratah lose sight of first place after defeat (18/05/18)
RD10: Raymond Terrace shock Cookers in sudden death (11/05/18)
RD9: Cookers drop 'Tahs to second with 6-5 slug-fest (04/05/18)
RD8: Hamilton take revenge in Battle of Oakdale (27/04/18)
RD7: Bailey best on field as 'Tahs in cruise-control (20/04/18)
RD6: Waratah break three-year hoodoo over old rivals (13/04/18)
RD5: Hamilton reclaim first place with 13-0 masterclass (06/04/18)
RD4: League's closest round sees 'Tahs take top spot (23/03/18)
RD3: Cooks Hill record first point with 5-5 draw (16/03/18)
RD2: Sudden-death deciders see Hamilton pip Belmont (09/03/18)
RD1: Waratah-Hamilton classic ends in 6-all draw (02/03/18)