The Chiefs got the better of the Sharks with a 37-29 victory in a high-scoring rematch of last year's Super Rugby final at Waikato Stadium.
Tries from Asaeli Tikoirotuma, Bundee Aki and Tim Nanai-Williams gave the Chiefs a 24-19 half-time advantage, although they needed Gareth Anscombe's impressive boot to stay ahead as the Sharks scored three tries themselves through Lubabalo Mtembu and a Derick Minnie brace.
Nanai-Williams went over again before Anscombe increased their advantage with another penalty. Keegan Daniel kept the Sharks in it before Pat Lambie and Aaron Cruden traded penalties late on.
The Brumbies confirmed their status as the top side in the Super Rugby Australian Conference with a crushing 41-7 victory over the Western Force at Canberra Stadium.
Tries from Jesse Mogg, Henry Speight (two), Tevita Kuridrani, Joe Tomane and Siliva Siliva capped a scintillating display that keeps the Brumbies ahead of the Reds by three points after round 11.
Burton Francis kicked 11 points to help the Cheetahs keep their Super 15 play-off hopes alive with a 26-12 victory over the lowly Southern Kings.
Raymond Rhule and Lappies Labuschagne also crossed for tries in the first half but three penalties from Demetri Catrakilis kept the Kings within touching distance.
However, the Cheetahs pulled away after the interval with another try from Willie le Roux to climb into the top six in the standings.
The Bulls climbed to the summit of the South African conference in Super 15 after a hard-fought 30-19 win over the Waratahs at Loftus Versfeld.
An eighth consecutive win over the Waratahs came the hard way for the Bulls, who were outscored by three tries to two but could count on six penalties from Morne Steyn to see them over the line.