Toulon will challenge a five-point deduction, which is suspended for three seasons, following comments made by their president.
Montpellier put Toulouse to the sword, Piula Faasalele's dismissal proving to be costly as last year's runners-up scored 10 tries.
Leicester Tigers produced a storming second-half fightback but Ted Hill's late try gave Worcester Warriors a first win of the season.
South Africa coach Rassie Erasmus has increased his options ahead of home Tests against Australia and New Zealand.
Saracens scrum-half Richard Wigglesworth is set to become the Premiership's all-time record appearance holder – here are his best stats.
Clermont Auvergne remain top of the table, but they suffered a first defeat of the Top 14 campaign at the hands of Bordeaux.
The Southern Kings claimed a first Pro14 win of the season and consigned Glasgow Warriors to a first loss in Port Elizabeth.
Northampton Saints slumped to a third defeat in four as Bath won at The Rec, while Wasps and Bristol also secured victories.
The Cheetahs' three-match losing run in Pro14 ended but a last-gasp try saw Ulster deny them victory.
Toby Flood's yellow card proved to be costly as Exeter Chiefs made it four Premiership wins out of four.