Munster must improve their discipline if they are make it back-to-back wins in their Champions Cup pool, says Stephen Larkham.

Racing 92, who beat Saracens at the weekend, are the visitors to Thomond Park on Saturday (5.30pm) with the Reds looking to make it two from two following their bonus-point win over Ospreys.

However, their penalties conceded tally of 14 stood in stark contrast to the five that the Paris outfit were blown for.

"Most of the penalties that we gave away were decisions that were made around the breakdown or the offside line so they are easily fixed but it's been a bit of an issue for us this whole season," attack coach Larkham told RTÉ Sport.

"If you compare this season to last season our figures are almost double at this stage. 

"At the moment it’s about the players making the right decision on the field.

"[Racing] showed some really good discipline in that game. They’ve got a big forward pack, they’ve got some classy backs.

"They are a little bit unpredictable but what I was really impressed with was their discipline when it could have got messy out there."

Meanwhile, Aussie Larkham has confirmed that both JJ Hanrahan and Rhys Marshall have returned to training.

Hanrahan missed the weekend's win over Ospreys with a hamstring issue, while Marshall has been sidelined with a knee problem.

But Larkham says the pair will be monitored throughout the week. 

The 102-times capped World Cup winner said: "Things are progressing well for both of them but like any rehab programme we’ve got to make sure they are ticking the final boxes…we have to wait and see."