Munster are confident that lock Jean Kleyn and Ireland international wing Simon Zebo will be available for their opening Champions Cup game against Castres in France on Sunday (2pm).

Kleyn has been troubled by a neck injury recently but is expected to train fully this week and will be available for selection.

"Jean I really think there’s a good chance of him being available this weekend," head coach Rassie Erasmus told RTÉ Sport.

"He’s looking on track so hopefully he’s ready but obviously we won’t be stupid and risking him with a neck injury is always very serious. We’ll try to see how he goes but he looks very good."

"Simon should also be available this week."

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Meanwhile, CJ Stander says Munster must be smarter around the pitch for their Pool 4 tie with the Top 14 side, who sit 11th in the French table. 

Last year’s semi-finalists conceded 10 penalties against Leinster in Saturday’s Pro14 defeat and the South African admitted that this stat alone could tell the story of their loss.

"We made it easy for them to get points and put us under scoreboard pressure," the back row forward said. 

"We need to make sure we are on the right side of the ref.

"We look at the referees and what the directive is for the next few weeks.

"We need to make sure that on an individual level that you know that if you give a penalty away that you are letting the boys down and maybe you’re going to lose the game."

"We know it’s going to be a physical battle from minute one, they’ve got a powerful pack and the same with their backline."