Friday 21 November 2014 11:21, UK
Table-topping Ospreys will be aiming to continue their perfect start to the Guinness PRO12 season when they travel to Ulster.
The Welsh side have already secured seven successive victories, equalling their best ever start in the tournament set a decade ago, and they will look to make it eight against an Ulster side that have lost just once on home soil since last September.
In Friday's other games, Munster, who have lost only one game in any tournament since the opening game of the new season and lost just once away from home since March, travel to the Dragons while Scarlets host Glasgow and Connacht take on Zebre.
Ulster are boosted by the returns of Darren Cave, Craig Gilroy and Stuart Olding from Ireland duty for their meeting with the Ospreys.
All three played in the international side's win over Georgia at the Aviva Stadium last weekend and return for Friday's Kingspan Stadium clash.
Olding starts at full-back with Gilroy named on the left wing in the only change to the side that beat the Dragons 23-6 at the start of the month. Louis Ludik completes the back three on the right wing.
Cave will start at outside centre, with Stuart McCloskey joining him in midfield at inside centre.
Paul Marshall and Paddy Jackson continue their partnership in the half-backs.
Up front, Callum Black and Wiehahn Herbst start either side of Rob Herring in the front-row, while Lewis Stevenson and Franco van der Merwe are paired in the second row.
Roger Wilson has recovered from a shoulder injury and starts at number eight with Sean Reidy selected at openside and Clive Ross named at blindside.
Nick Williams has recovered from the knee injury that kept him out of the win over Dragons and is in line to make his 50th appearance for Ulster if he is called upon.
Meanwhile, the Ospreys are without Tyler Ardron, Scott Baldwin, Dan Biggar, Jeff Hassler, Aaron Jarvis, Alun-Wyn Jones, Josh Matavesi, Nicky Smith, Justin Tipuric and Rhys Webb due to international commitments, with Rory
Thornton and Ifereimi Boladau set to make their PRO12 debuts if they come off the bench.
Martin Roberts and Sam Davies form the half-back combination with Ashley Beck and Andrew Bishop in the centres.
The impressive Dan Baker wears the number eight jersey and is alongside Sam Lewis and James King in the back-row.
JJ Hanrahan will start at full-back as Munster have made seven changes for their trip to Newport Gwent Dragons.
The Irish side currently sit fourth in the Pro12 but are without a number of internationals this weekend.
As a result Hanrahan has moved to the more unfamiliar position of full-back, with Ian Keatley starting at fly-half after featuring for Ireland last weekend.
There are a couple of new names included, with Eusebio Guiñazu set for his first start for the province, while new centre Pat Howard is in line to make his debut off the bench.
Elsewhere Dave O'Callaghan will make his first appearance for the side since February, while his namesake Donncha captains the side.
Meanwhile the Dragons welcome back Hallam Amos who was released by Wales and comes straight into the starting lineup in five changes made by Lyn Jones.
Regan King will start for the Scarlets at centre when they return to action against Glasgow Warriors at Parc y Scarlets.
King returns to the side after a lengthy period on the sidelines due to a hamstring injury received in the season opener against Ulster.
He will be joined by Gareth Owen at inside centre while Harry Robinson and flying Fijian Michael Tagicakibau add power and pace out wide.
Young full-back Steff Evans has been rewarded after good performances against Zebre, Northampton Saints and Cardiff Blues in recent weeks.
John Barclay adds weight to the back of the scrum and will also lead the Scarlets against his former side. Joining him in the back-row will be Aaron Shingler and James Davies.
Meanwhile, 18-year-old Zander Fagerson will make his first start for Glasgow while 21-year-old scrum-half, Ali Price will make his debut, after joining in 2013 from Bedford Blues.
All Black centurion Mils Muliaina will make his Connacht debut against Zebre in a much-changed side for the clash.
Centre Bundee Aki will make his home debut and is one of only two players retained in the back line with Matt Healy kept on the left wing.
Miah Nikora has been handed his first start of the season and is partnered by scrum-half Ian Porter while Dave McSharry makes up the midfield pairing with Aki.
Zebre have had to deal with a number of international absences, and will give winger Michele Visentin a debut as a result.
Roberto Santamaria and Braam Steyn are also included in the matchday squad as permit players during the international period.
The Italians still have an experienced back row, with Mauro Bergamasco captaining the side alongside Filippo Cristiano and Dries van Schalkwyk.
