Three players were sent off during the first half as the Sharks edged the Chiefs 12-11 in a bruising Super Rugby clash in Durban.
It was a huge win for the Sharks who were a man down for most of the match due to the red-card frenzy.
Sharks hooker and skipper Bismarck du Plessis and centre Francois Steyn and Chiefs hooker Hikawera Elliot were red-carded by Australian referee Angus Gardner within 28 minutes of the kick-off on Saturday (Sunday AEDT).
Several other players were lucky to escape at least a yellow card with Chiefs replacement back Tom Marshall not punished for striking halfback Cobus Reinach in the back with his knee.
"It was a very ugly first half," conceded Sharks five-eighth and stand-in skipper Patrick Lambie.
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"It is never nice to see players being sent off in a rugby match."
Chiefs skipper and flanker Liam Messam jumped to the defence of the red-carded trio, stressing that none of them were "dirty players".
"Rugby is a contact sport and that is the way it goes sometimes. None of those sent off are dirty players," said the All Black Messam.
Elliot was first to go having struck Sharks prop Tendai 'The Beast' Mtawarira on the back of the head with a flying shoulder during a ruck after 16 minutes.
A fallen Du Plessis followed him to the touchline just two minutes later after pushing his right boot into the side of the face of Chiefs No.8 and Japan captain Michael Leitch.
Steyn was dismissed on 28 minutes with the referee overruling the television match official (TMO), who believed a dangerous tackle on Chiefs five-eighth Aaron Cruden was only a yellow-card offence.
Lambie kicked four penalties from five attempts to win the sixth-round match for the Durban outfit, who trailed 11-9 at halftime in wet, windy conditions.
Chiefs flanker Sam Cane scored the only try at Kings Park stadium and Cruden slotted two penalties while missing two other shots at goal.
Victory lifted the Sharks three places to fifth on the southern hemisphere inter-provincial championship table while two-time champions the Chiefs remained fourth.
Lambie and Cruden exchanged penalties within five minutes of the kickoff and after the three red cards, they slotted another penalty each.
Cane struck on 34 minutes with a try that had 'made in South Africa' stamped on it.
Chiefs won a line-out, created a driving maul and over Cane went, using a tactic much favoured by South African Super 15 teams.
Lambie cut the gap to two points with his third penalty on the stroke of half-time and another successful shot at goal on the hour proved decisive.
