The Sharks consolidated their lead at the summit of the Super Rugby standings on Saturday with a 32-10 win over the Waratahs at Growthpoint KINGS PARK in Durban.
The result leaves Jake White's side six points clear of the Brumbies, meaning they will keep top spot for at least another fortnight.
The home side outscored the 'Tahs two tries to one thanks to touchdowns from loose forwards Willem Alberts and Keegan Daniel while Bernard Foley scored a consolation try for the visitors.
A bad-tempered and unentertaining first-half came to an end with the Sharks leading 12-3 thanks to penalties from Fred Zeilinga and Frans Steyn.
Highlights from the first half were few and far between as both sides looked for territory with the boot.
Both Steyn and Rob Horne were lucky not to see yellow cards for late and high tackles respectively as constant niggle threatened to boil over and made for a poor spectacle, although both were later cited for alleged foul play.
Foley's kicking was below-par and there were handling errors aplenty in the humid conditions.
The second half wasn't much better as the Sharks continued to grind their visitors down.
When the home pack crashed over from a driving maul on the 50 minute mark, the result looked settled.
Zeilinga's fourth penalty and Daniel's try - from a penalty taken quickly from short range - secured the win as it took the scores to 27-3.
Pat McCutcheon broke to put Foley over in the dying minutes but it was too little, too late for the Waratahs.