Gloucester returned to the play-offs for the first time since 2011 despite losing to Worcester Warriors, who sealed Premiership safety.
Bernard Laporte wanted Joe Schmidt to take over as France head coach, but Fabien Galthie will succeed Jacques Brunel.
It was a controversial win for Argentine hosts Jaguares, whose try prior to half-time was awarded by TMO for a 17-15 lead.
Top 14 leaders Toulouse enjoyed a fine day as several rivals were beaten amid a series of dramatic finishes.
A dramatic final day of the regular season in the Pro14 saw Glasgow Warriors make the semi-finals, while Ospreys and Scarlets will face off.
Exeter Chiefs and Saracens kept winning at the top on Saturday, while Leicester Tigers' Premiership status is not yet secured.
The Stormers have now won eight consecutive home matches against the Bulls after outscoring their South Africa rivals by three tries to two.
With Ollie Devoto's try against Harlequins on Saturday, Exeter Chiefs crossed in a record 72nd consecutive Premiership match.
Jordie Barrett scored two tries and laid on another in an emphatic win for the Hurricanes and the Sharks made a great start to their tour.
Anthony Watson was back in Premiership action on Friday, but Newcastle Falcons' time in the top flight looks to be coming to an end.