Iliesa Ratuva Tavuyara touched down and Tommaso Allan converted with the last play of the game as Benetton Treviso held Leinster in Dublin.
Toulon may have been at a numerical disadvantage for most of the second half but they still managed to defeat Top 14 leaders Toulouse.
Exeter Chiefs earned a home semi-final with four games to spare, while Saracens scored a late try to hurt Newcastle's survival hopes.
The Jaguares were headed for defeat at Loftus Versfeld until Domingo Miotti came off the bench and enjoyed the most remarkable debut.
Ben Youngs had an operation on his shoulder and will consequently miss the rest of Leicester Tigers' Premiership campaign.
The Waratahs went down to the Blues despite Israel Folau making Super Rugby history, while there were wins for the Crusaders and the Rebels.
A try against the Blues was Israel Folau's 60th in Super Rugby, giving him the outright record for five-pointers in the competition.
Brian O'Driscoll knows Ireland need Johnny Sexton to be fit and firing if they are to make an impact at the Rugby World Cup...
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