Petrarca Padova won the match of the night, a one point win over Bourgoin at Stade Pierre Rajon.
The Italians ran in 29-28 winners, at the home of the French side.
Meanwhile, Bristol got their European campaign back on track with an impressive 39-11 victory over Toulon at the Memorial Ground.
Outside-half Adrian Jarvis scored six penalties in 22-point haul that also included conversions following tries from Vungakoto Lilo and England international Dan Ward-Smith.
Captain Joe El Abd scored late on to complete the victory that reignites Bristol's campaign in Pool 2 of the European Challenge Cup following defeat to Montpelier.
Orente Al'i crossed after 13 minutes but Toulon, led by former All Black Jerry Collins, rarely looked like winning and are now struggling to make it past the pool stage.
Topsy Ojo scored twice in the second half as London Irish ran out 27-10 winners over Connacht at the Galway Sportsground to take a grip of Pool One.
England wing Ojo scorched over on five minutes after the break before sealing the bonus point victory with a second score in the final minute to ensure the Exiles have taken a maximum ten points from their opening two games.
Elvis Seveali'i crashed over for the game's opening try inside ten minutes but it was Selala Mapasua's length of the field score that handed Irish a 12-7 half-time lead.
Connacht hammered away at the visitors' try line but when Fionn Carr fumbled Liam Bibo's inside pass yards out,
Samoan centre Mapasua was forst to react, scooping up possession before scorching 100 metres up field for Irish' second try.
Carr made amends within two minutes when the full-back slipped through on 16 minutes and Ian Keatley swept home the conversion. But London irish closed up shop before Ojo struck late on.
Bayonne won 26-8 at French rivals Mont de Marsan in Pool 5 in a result that benefits Saracens' hopes of qualification. Craig Gower and Nicolas Laffite scored the game's only tries after Manny Edmonds kicked three penalties.
