Mathieu Bastareaud was sent off but Toulon fought back to claim their first Top 14 victory of the campaign.
Widnes Vikings are on the brink of falling into the Championship following a home loss to Leeds Rhinos on Sunday.
Worcester Warriors were unable to complete a comeback from 18-0 down at Sale Sharks as they remain winless in the Premiership.
He has not fought since January 2015 but Sonny Bill Williams plans to return to the boxing ring in December, with Steve Hansen's blessing.
St George Illawarra Dragons booked a meeting with South Sydney Rabbitohs in the NRL finals after defeating Brisbane Broncos 48-18 on Sunday.
All Blacks duo Brodie Retallick and Ngani Laumape will both be sidelined due to injury.
Clermont won an early top-of-the-table clash with Stade Francais, while there were also Top 14 victories for Racing 92, Toulouse and Lyon.
Pro14 champions Leinster were defeated by last season's runners-up Scarlets in a tense clash on Saturday.
South Africa's Rassie Erasmus was frustrated with the way they allowed Australia to score tries while struggling on Saturday.
Danny Cipriani inspired Gloucester's comeback as a former Bath player denied the hosts victory at the Rec on Saturday.