Leo Cullen admits that Leinster are under extra pressure following the EPCR decision to award a 28-0 loss against them in round 2.

Despite being on the verge of sending a team to play Montpellier in the middle of December, organisers decided to cancel the game and subsequently deemed the result a bonus-point win for the French side.

Other games that were cancelled in that round were all declared 0-0 with four points shared equally.

With five points on board from the opening round win over Bath, the four-time winners now have to get back on track with the Top14 side the visitors to the RDS on Sunday (1pm).

"There's pressure on this game regardless but yes, if you look at the league table, we can’t afford any slip-ups at this point," said Cullen, whose side sit in seventh place in Pool A.

"That’s good, we want pressure on us."

Cullen was speaking after naming his side to face Phillipe Saint-Andre's team on Sunday afternoon, with Johnny Sexton and James Lowe starting on the bench, while Robbie Henshaw and Ryan Baird miss out on the match-day squad.

On the Ireland and Leinster captain, who hasn't played since the win over New Zealand in November, the head coach said: "Johnny is pretty good, yeah.

"Coming back from his injury, he's worked hard and trained well over the last few weeks.

"We've put all the players through those game scenario pieces and he's come through that well.

"Hopefully, he'll provide big impact off the bench for us this weekend and that will serve him well then for what is ahead over the next few weeks.

"James had a knock, so he was bit more affected in terms of training over the last couple of weeks, and Jimmy [O’Brien] has gone well.

"So that's the logic there. But we expect James to come into the action at some stage and provide good impact as well.

"[Robbie and Ryan] came back, they were training today, just a little bit tight on time for the two of them.

"They are there now, they are both fit and available, but just the way week went, we had certain training scenarios, but those guys are back now so they'll be in the mix for next week."

When the Blues run out in Dublin 4 on Sunday, it will be their first competitive action in five weeks.

Montpellier, meanwhile, saw their Top14 match against Toulouse cancelled last weekend but played against Biarritz just after Christmas.

"Well it's a bit of an unknown at the moment, with no games," added the former Ireland second row.

"A slightly frustrating period, but at the same time the guys have applied themselves unbelievably well.

"They've worked away at lots of different parts of our game over the last few weeks and it's been nice and competitive in training as well, so it's been good for us.

"Still, nothing quite beats games, and everyone is looking forward to getting playing now, so there is a genuine excitement to get back.

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"I know we are still restricted in terms of crowds, but for the 5,000 or so lucky ones who get to go, hopefully it's going to be a good day for them. We're just excited to play now.

"It's almost like there is two stories going on at the moment.

"So there is the excitement levels to get back playing, because we know there are a lot of big games coming up, two European games, and the tournament means a huge amount to the club.

"So there is that piece, but then there is the frustration of what has gone on over the first couple of rounds of the tournament.

"We're only in so much control of that, so for us it's making sure that we control what we can, and that has very much been trying to train well, have nice competitive training sessions which will hopefully serve us well for some of the challenges we have coming up now."

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Follow Castres v Munster (Friday, 8pm), Connacht v Leicester (Saturday, 3.15pm), Leinster v Montpellier (Sunday, 1pm) and Northampton v Ulster (Sunday, 3.15pm) via our live blogs on rte.ie/sport or on the RTÉ News App, or listen to live radio coverage of Castres v Munster and Connacht v Leicester on RTÉ Radio 1 Extra and RTÉ Radio 1.