Munster managed to maintain their unbeaten streak in the ongoing season of Pro 14 as they overcame Ospreys with a 16-21 triumph in their Pro 14 clash in Swansea.
Alex Dunbar scored a double while Finn Russell kicked 11 points as Glasgow Warriors secured a 31-10 bonus point victory over Ospreys in their Pro 14 clash at Scotstoun Stadium.
England international Manu Tuilagi made his first return in eight months for his club Leicester Tigers' during the pre-season friendly clash against Ospreys on Friday.
Munster came up with a three try performance as they went on to defeat Ospreys by 23-3 in the semi final of Pro 12 at Limerick to set up a clash in the finals with Scarlets next weekend.
Stade Francais successfully overcame a sin-bin and a red card of Josaia Raisuqe to win the European Challenge Cup quarter-final against Ospreys at Principality Stadium on Sunday.
Dave Kilcoyne scored the decisive try and fly-half Tyler Bleyendaal followed it with a conversion as Munster sealed a thrilling 23-25 win over Ospreys in their Pro 12 encounter in Swansea on Saturday.
Ospreys made a stunning comeback in the final 10 minutes scoring two tries in it to come from behind and secure a 22-31 bonus-point victory over Wasps at Ricoh Arena in the Anglo-Welsh encounter on Sunday.
Sam Underhilll scored the decisive try in the 76th minute as Ospreys managed to overhaul Bristol challenge with a 20-14 victory in their Anglo-Welsh game on Saturday.
A stunning second half performance from Ospreys saw them claim a 21-26 victory over Newcastle Falcons in the European Challenge Cup encounter at Kingston Park on Saturday.
Ospreys came with a dominant second half performance as they thrashed Lyon by 47-7 at Liberty Stadium on Sunday to secure a quarter-final berth in the ongoing European Challenge Cup tournament.
Wales international Dan Biggar contributed with 14 points as Ospreys successfully overhauled Scarlets challenge and registered a 19-9 victory in their Pro 12 encounter in Swansea on Tuesday.
Scott Baldwin, Dan Evans and Hanno Dirksen scored doubles while Dan Biggar contrbuted with 21 points as Ospreys trounced Grenoble by 71-3 in their European Challenge Cup game at Liberty Stadium on Saturday.