The NTFA premier division's two unbeaten teams both went down in one of the closest rounds of the season.
South Launceston ended Deloraine's perfect start to the season as Bart McCulloch proved uncontainable at Youngtown Oval.
On a day when both sides took the chance to celebrate umpire Garry Kaine's 700th game, the Bulldogs raced out to a five-goal lead at half-time before winning 13.8 (86) to 8.4 (52).
McCulloch finished with five in his best game since returning to the kennel while Daniel Berry, Leigh Harding and Mitch Hills all went home with two.
Roos coach Lochy Dornauf (two goals) led from the front while Darren Banham (four) remains the league's leading goalkicker.
MORE FOOTBALL: North Launceston scrappy but happy
ROCHERLEA pulled off the upset of the round, toppling ladder-leader Longford 10.17 (77) to 11.5 (71) to jump from seventh to sixth.
Leading by three goals heading into the final term, the visitors were forced to survive a late surge from the Country Tigers as Luke Murfitt-Cowen (six) finished with another bag.
Brayden Claridge (five goals) and Josh Holton (four) shouldered Rocherlea's forward line for the second week running as Luke Purdon and Luke Richards shone in defence.
A spirited comeback saw BRIDGENORTH overcome a four-goal three-quarter time deficit to topple Scottsdale.
Having kicked just five goals all day, the Parrots doubled their tally in the last term to win 10.11 (71) to 10.7 (67).
James Griffiths (five goals) was best on ground with Matt Zanetto (two goals) and Wian Dekker also starring.
In the Friday night game, HILLWOOD snagged its first win of the season at George Town.
Ben Hyatt (three goals) and Jayden McHenry gave four-quarter efforts in the 15.10 (100) to 10.7 (67) victory as Andrew Whitmore (four), Josh Moore (three) and Jake Pearce and Michael Danks-Graham (two each) all kicked multiples.
Luke Crane, playing his second game of 2021, did the heavy lifting for George Town with five goals.