But the French club, in their first European tie, ensured a share of the spoils with Conrad Barnard's last-minute penalty.
However two points away from home could still be crucial at the end of the pool.
Dean Ryan will be happy to return to Sixways where Warriors have an 84 per cent win-rate in the Amlin Challenge Cup.
But that will be severely tested by Sale Sharks who kicked off this year's tournament with a rousing victory over Biarritz Olympique.
Sharks were champions in 2002 and 2005 but have failed to reach the knock-out stages in Europe for the past five years.
They know how important it was to win the opening game and were good value for their first victory in Europe in almost exactly 12 months courtesy of their set-piece dominance that bought a pair of penalty tries. Russian lock Andrei Ostrikov added an impressive solo try.
Meanwhile in this Anglo-French pool, Biarritz welcome Oyonnax to Parc des Sports Aguilera for the first time.
The sides have already met in the Top 14 this season, when Oyonnax won 24-22, and this clash looks set to be just as closely fought.