Viadana will be looking to cause a huge shock when they face Pool 4 favourites Biarritz.
The 2006 finalists travel to Italy hoping for a better campaign this time around after narrowly losing to Northampton Saints 7-6 in last season’s quarter-finals.
Biarritz, under the guidance of coach Jacques Delmas, have won five out of their last six on the road in Europe. Their only defeat came in the 2006 Cardiff final where they lost 23-19 to Munster.  
The Italians are back in the competition after six years out and will be looking to record  their first ever victory in the Heineken Cup.