Wins for Toulon and Clermont at the weekend has kept the race for top spot alive in France's Top 14.
Toulouse maintain their unbeaten run in Pool 4 with a hard-fought 12-9 win over Glasgow.
Gregor Townsend was disappointed that Glasgow did not take their chances as they were beaten 12-9 by Toulouse.
Glasgow will look to make amends for their defeat to Toulouse last weekend when the pair clash again at Scotstoun.
Toulouse beat Glasgow Warriors 19-11 and moved into first place in the European Champions Cup Pool Four.
Glasgow Warriors boss Gregor Townsend rued the indiscipline that cost his side against Toulouse.
Reigning Top 14 champions Toulon claimed a 27-19 victory against Clermont Auvergne in a clash of the titans on Saturday.
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