The full-back is a key member of the back-line, but picked up an ankle injury while playing for in the Top 14 against Clermont over the weekend and will now miss a reunion against his former employers.
Meanwhile, Munster are facing somewhat of a crisis at the moment heading into the game at fly-half, with Joey Carbery and Tyler Bleyendaal definitely missing the game through injury and JJ Hanrahan is in a race to be fit.
With all of their top three No 10’s possibly missing the trip to Paris it appears likely that Rory Scannell or Ben Healy will have to take the reins at playmaker.
Elsewhere they will certainly be without long-term absentee Tadhg Beirne, while Andrew Conway is a major doubt with a neck injury and Tommy O’Donnell is battling to be fit as he tries to shake off a hamstring injury.
The game is vital to the overall standings in Pool 4, with Racing currently sitting top of the table and knowing a win will secure their place in the quarter-finals with a game to spare. While Munster need a win to stand a chance of progressing as they try to withstand Saracens fight-back in the group.
The Irish province may have more injuries to worry about, but it will be interesting to see how big a loss Zebo is to the home side on Sunday.
Ulster name team for Northampton Quarter-Final trip
Michael Lowry is named to start at full-back, and is joined in the back three by Jacob Stockdale and Robert Baloucoune. Stuart McCloskey and James Hume will form the midfield duo, and Billy Burns and John Cooney are the starting half-backs.
In the front row, Eric O’Sullivan, Rob Herring and Marty Moore retain their starting berths. Alan O’Connor will partner Kieran Treadwell in the second row. Last week’s Player of the Match, Sean Reidy, will start at blindside flanker, with Jordi Murphy skippering the team at openside and Nick Timoney at Number Eight.
John Andrew, Andrew Warwick, Tom O’Toole, Matty Rea and Greg Jones will provide the forward reinforcements from the bench, with Alby Mathewson, Ian Madigan and Ethan McIlroy named as the back line options.
Ulster team to play Northampton Saints, Challenge Cup Quarter-Final, Saturday 10 April at Franklin’s Gardens (kick-off 8pm, live on BT Sport):
(15-9) Michael Lowry, Robert Baloucoune, James Hume, Stuart McCloskey, Jacob Stockdale, Billy Burns, John Cooney;
(1-8) Eric O’Sullivan, Rob Herring, Marty Moore, Alan O’Connor, Kieran Treadwell, Sean Reidy, Jordi Murphy (Capt.), Nick Timoney.
Replacements: John Andrew, Andrew Warwick, Tom O’Toole, Matty Rea, Greg Jones, Alby Mathewson, Ian Madigan, Ethan McIlroy.
Big names miss out for Ulster
The back line sees just one change from the side that played Toulouse last Friday. Michael Lowry, Jacob Stockdale and Matt Faddes all retain their positions in the back three. Stuart McCloskey and James Hume are the starting midfield duo. Billy Burns returns at fly-half and will captain the side; he will partner John Cooney at scrum-half.
The front row remains unchanged for this game. Rob Herring is named at hooker, with Eric O’Sullivan and Marty Moore packing down at loosehead and tighthead prop. Alan O’Connor will partner with his brother David – who will make his first Heineken Champions Cup start with Sam Carter missing out through concussion. Sean Reidy has been selected at blindside, with Jordi Murphy returning at openside. Nick Timoney comes in to start at Number Eight to replace the injured Marcel Coetzee.
John Andrew, Kyle McCall, Tom O’Toole, Matty Rea, and Greg Jones are the forward bench options. Academy player, Ethan McIlroy could make his European debut if called upon from the bench, and is named alongside Alby Mathewson and Ian Madigan in the back line replacements.
Ulster team to play Gloucester, Heineken Champions Cup Round 2, Saturday 19 December 2020 at Kingsholm Stadium, kick-off 3.15pm, live on BT Sport / beIN Sport:
(15-9) Michael Lowry, Matt Faddes, James Hume, Stuart McCloskey, Jacob Stockdale, Billy Burns (Capt.), John Cooney;
(1-8) Eric O’Sullivan, Rob Herring, Marty Moore, Alan O’Connor, David O’Connor, Sean Reidy, Jordi Murphy, Nick Timoney.
Replacements: John Andrew, Kyle McCall, Tom O’Toole, Matty Rea, Greg Jones, Alby Mathewson, Ian Madigan, Ethan McIlroy.
Ulster name strong side to face Toulouse
In the back three, Jacob Stockdale returns from international duty to the left wing, joining Michael Lowry at full-back and Matt Faddes on the right wing. In midfield, Stuart McCloskey also returns from the Ireland squad to partner with James Hume. Ian Madigan has been named at fly-half alongside John Cooney at scrum-half.
Having made his international debut against Scotland last week, Eric O’Sullivan, comes in to take the starting berth at loosehead prop. Rob Herring also returns from Ireland duties and is named at hooker, with Marty Moore retaining his position at tighthead. Alan O’Connor will partner with Sam Carter, who will lead the side from the second row. Sean Reidy and Jordi Murphy are named at blindside and openside, with Marcell Coetzee completing the pack at Number Eight.
John Andrew, Andrew Warwick, Tom O’Toole, David O’Connor, and Matty Rea provide the forward options, with Alby Mathewson, Stewart Moore and Craig Gilroy offering back line cover from the bench.
Ulster team to play Toulouse, Heineken Champions Cup Round 1, Friday 11 December 2020 at Kingspan Stadium, kick-off 8pm, live on BT Sport / beIN Sport:
(15-9) Michael Lowry, Matt Faddes, James Hume, Stuart McCloskey, Jacob Stockdale, Ian Madigan, John Cooney;
(1-8) Eric O’Sullivan, Rob Herring, Marty Moore, Alan O’Connor, Sam Carter (Capt.), Sean Reidy, Jordi Murphy, Marcell Coetzee.
Replacements: John Andrew, Andrew Warwick, Tom O’Toole, David O’Connor, Matty Rea, Alby Mathewson, Stewart Moore, Craig Gilroy.