Ospreys produced a stirring fightback to beat Newcastle Falcons 26-21 in the European Challenge Cup and become the first team to finish the pool stage of a European competition with maximum points.
Steve Tandy's side will go into the quarter-finals as the top seeds after rallying from 21-7 down at half-time to defeat the Falcons in the Pool Two clash at Kingston Park on Saturday and extend their winning run to 10 matches.
The Pro12 leaders were up against it after Daniel Temm, Rob Vickers and Chris Harris scored first-half tries following an early converted score from Rhys Webb.
Ospreys responded following the interval, with Hanno Dirksen, Sam Davies and Scott Otten going over to ensure they are the only side to claim bonus-point wins in every pool match.
Bath sealed their place in the last eight in style with a 10-try 69-10 demolition of Pau to finish top of Pool Four.
Anthony Watson and Paul Grant scored two tries apiece as Pau suffered a sixth defeat out of six in the competition, while Cardiff Blues advanced as one of the three runners-up by beating Bristol 37-21.
Brive will face Todd Blackadder's men in the quarter-finals after Soso Bekoshvili scored a try in each half in a 36-19 Pool Three victory over Newport Gwent Dragons, ending the Welsh side's participation in the Challenge Cup.
Gloucester will be at Kingsholm in the quarter-finals after inflicting a 64-19 drubbing on hapless Bayonne, with Willi Heinz scoring a hat-trick for the Premiership outfit.
La Rochelle had already qualified and will play Edinburgh in the last eight following their 31-18 success over Benetton Treviso, while Worcester Warriors and Lyon bowed out with crushing wins over Enisei-STM and Grenoble respectively.