Jaguares continued their impressive start to the Super Rugby season with a 22-8 win over struggling Queensland Reds on Saturday.
The Argentine side have already matched their win tally of their maiden campaign after making it four victories in five to start 2017.
Jaguares made the most of first-half yellow cards to Reds' Eto Nabuli and Kane Douglas to score twice through Jeronimo de la Fuente and Ramiro Moyano.
The hosts at the Estadio Jose Amalfitani in Buenos Aires led 15-3 at half-time, the result sealed when De La Fuente crossed again in the 48th minute.
Jaguares are second in Africa 2 Conference, while struggling Reds have just one win from five to be third in the Australian Conference.
Curwin Bosch produced a superb kicking display and Kobus van Wyk scored a try in each half as Sharks claimed a 38-30 derby win over Cheetahs in Bloemfontein.
Sharks trailed 23-15 early in the second half, but fought back to stretch their winning run to four matches with South Africa trio Tendai Mtawarira, Coenie Oosthuizen and Lwazi Mvovo back in action.
Mvovo claimed the first of four Sharks tries, while Bosch scored 18 points with the boot and Van Wyk went over following a sustained period of pressure before touching down for a second time after a great run from Garth April.
Cheetahs have now lost three games this season after falling short in the second half, with Raymond Rhule's late try in vain.
Lions ran riot against Southern Kings in Port Elizabeth, where Madosh Tambwe scored two of their five first-half tries in a 42-19 rout.
Southern Kings were blown away in the first half at Nelson Mandela Bay Stadium, going in 35-12 down at the break as Elton Jantjies was also among the try-scorers and scored 10 points from the tee.