The Sharks stayed in the hunt for a Super Rugby play-off spot by consigning the Lions to a first defeat in 22 derbies with a 31-24 victory and the in-form Jaguares saw off the Stormers on Saturday.
South African Conference leaders the Lions had won seven consecutive matches against the Sharks, but that run came to an end after the home side came storming back at Kings Park.
Swys de Bruin's side were 21-11 up at the break following tries from Ruan Combrink, Cyle Brink and Kwagga Smith after Dan du Preez's five-pointer had put the Sharks in front.
The Sharks turned it around in the second half, Andre Esterhuizen and Lwazi Mvovo crossing and Robert du Preez taking his tally with the boot to 16 to move the Durban-based franchise just three points behind the eighth-placed Rebels.
Daniel Hourcade's Jaguares have now won seven consecutive matches after a 25-14 defeat of the Stormers.
Bautista Delguy, Guido Petti and Matias Orlando went over for an entertaining Jaguares who go from strength to strength and sit just three points behind the Lions in the South African Conference.