Conrad Stoltz and Pietman van Niekerk scored tries as Agen beat Gloucester 32-26 in the European Cup on Saturday.
Van Niekerk, a former Golden Lions prop, and Arnaud Mignardi went over in the first half, with the French side taking a 15-14 lead into the break.
Agen scored another two tries through Thomas Soucaze and ex-Cats centre Stolz to claim a valuable away victory that was sealed with a late drop goal.
Meanwhile in Paris, the Neath-Swansea Ospreys’ challenge faded in the final quarter as a lacklustre Stade Francais claimed a 27-14 win. Sonny Parker scored an excellent early try as the visitors started brightly, but Gavin Henson missed four kicks at goal.
In other matches, Northampton earned a valuable bonus point as they ran in five tries to outclass a brave Borders side 37-13, Munster scored six tries to thrash Bourgoin 41-26 and disappointing Wasps lost 19-12 to Perpignan as probable England fullback Josh Lewsey injured his knee.
South African-born Munster centre Trevor Halstead, according to reports, was outstanding.
European Cup results:
Gloucester 26 Agen 32
Stade Francais 27 Ospreys 14
Northampton 37-13 Borders
Perpignan 19 Wasps 12
Munster 41 Bourgoin 23