Exeter crashed to a 40-17 defeat to Bayonne in their Investec Champions Cup clash in France.
Munster have found themselves with European rugby egg on their face after getting shocked by French visitors Bayonne, who staged a late raid to secure a 17-17 draw in the opening round of the Investec Champions Cup.
The Scarlets made a confidence-boosting start to the European Challenge Cup as they powered to a 39-7 victory over Bayonne.