Stephen Brett marked his Clermont debut with a last-minute penalty as they escaped from Bordeaux with a 23-23 draw.
Northampton continued their recent improved form with a narrow 28-21 win over Castres in the Champions Cup
Glasgow players take a bow after demolishing Leicester 43-0 to make the Champions Cup quarter-finals for the first time.
Munster have qualified for the Champions Cup quarter-finals after victory over Glasgow Warriors in Scotstoun.
Clermont made it eight wins in eight home games with a bonus-point 30-6 rout of Toulon to regain the lead of the Top 14.
The Champions Cup returns to Sky Sports in January, with fixtures for rounds 5 and 6 announced by EPCR.
Castres revived their Champions Cup quarter-final ambitions with a 29-23 Pool 4 victory over Montpellier on Sunday.
Recap the action from Sunday's Champions Cup fixtures where Scarlets, Castres, Clermont and Saracens all recorded wins.
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