James Horwill’s Harlequins eked out a 25-19 win over Peter Betham’s Leicester Tigers on Saturday morning.
Horwill started at lock for the London side in the match, as they looked to stay in touch with the Premiership top three.
Betham was on the wing for the Tigers, who sit third in the competition.
Capped Wallaby Cooper Vuna will line up on the wing for Worcester in its match up with Sale on Sunday mornign (AEDT).
The Warriors are still searching for a third 2015-16 season win after being promoted to the Premiership.
Wallabies veteran George Smith will again start at openside flanker for the Wasps when they take on Bath.
Smith has been in scintillating form for Wasps in recent weeks and his side will be looking to keep itself in the top four with a win.
The French league returns to action this weekend after a Six Nations break, with plenty of Aussies in action.
Tighthead prop Sekope Kepu will come off the bench for Bordeaux against Agen on Sunday morning.
Wallabies back Adam Ashley-Cooper has not been named for the match.
Jesse Mogg will start at fullback for Montpellier against Pau this weekend, with halfback Nic White coming off the bench in the clash.
While halfback Will Genia returned to Brisbane for specialist knee advice, his Top 14 side Stade Francais managed another competition win, 32-17 over Brive.
Toulon plays Oyonnax in the early hours of Monday morning (AEDT), with James O'Connor named in a 24-man squad to travel for the game.
Taqele Naiyaravoro’s Glasgow Warriors beat out Munster 27-24 on Saturday morning (AEDT).
Naiyaravoro, who is reportedly considering returning to Australia at the end of the season, lined up on the wing for the Warriors.
Usual Munster lock Mark Chisholm did not play in the match.
Capped Wallaby Luke Burgess will start at halfback for Zebre when the Italian side faces Connacht.