Ulster head coach Neil Doak has warned his side will need to be playing international-quality rugby if they are to get the better of Clermont in the Stade Marcel-Michelin on Sunday
The province edged a nine-try thriller against the French giants in Kingspan Stadium last weekend to give them a real chance of progressing to the Champions Cup quarter-finals for the first time since 2014.
Win this weekend and they would be in the driving seat for the last eight but Doak believes the challenge will be even greater in the Auvergne.
"The European games, they're massive," he said. "They bring a different edge to things, and everybody knows what needs to be done. You need to be at your best. You've got to be the best on the pitch."