Montpellier crashed to the worst defeat ever suffered by a French side in European Champions Cup history on Sunday when they were thrashed 89-7 by Irish province Leinster.
Experienced Kiwi fly-half Jimmy Gopperth kicked half of 14-man Wasps' points as they stunned holders Toulouse 30-22 in the European Champions Cup on Saturday.
Wasps ended Leicester's perfect start to the season with a 16-13 victory in the English Premiership on Sunday as Bath won for the first time this campaign by defeating 14-man Worcester.
Leinster cancelled training ahead of their Champions Cup match with Montpellier, while Wasps are struggling to get a full team for their trip to Toulouse.