Munster head coach Johann van Graan expects Andrew Conway to recover from a knee injury in time to face Castres in the Heineken Champions Cup on Sunday.

The winger has scored five tries in his last two games: a hat-trick against the USA for Ireland on 24 November and a brace in the province's win over Edinburgh last weekend, before he took a knock to the knee that forced him off.

However, Van Graan told RTÉ Sport today that the injury was "nothing serious, so hopefully he will be ready to go".

Internationals Conor Murray (neck) and Chris Farrell (cruciate ligament) both made their first starts of the season in the 44-14 rout after long-term injury absences.

Farrell scored two tries while Murray set up another before ending up on the wing after Conway departed.

"Just as I was about to pull him (Murray) off, Andrew went down with that knock. It wasn’t the plan but fair play to him, he adapted quite well on the wing," said Van Graan.

"I thought Chris Farrell played very well and got a man of the match reward for that.

"It’s another step in the right direction for both of them. It’s really important to have your world-class players available."

Full-back Mike Haley (return to play protocols), prop Stephen Archer (illness) and wing Darren Sweetnam (back) are all questionable for the first of back-to-back fixtures against the Top 14 side.

Munster thumped Castres 48-3 last January

Despite their current seventh place in the French league, Van Graan is wary of a team who held Munster at home in the opening game of last year's pool stages before being thrashed at Thomond.

"We face brilliant opposition at the weekend. Regardless of other results, they’re a quality outfit," he said.

"I think they’ve got close to the best kicking game in French rugby at this stage. Their half-backs are very dangerous when they kick and Robert Ebersohn at 13 is such a big worker off the ball for them. He cuts off a lot of options.

"We know what to expect, a massive kicking game from them and then their poach threat, broken-field threat and they’ve got a very good maul. It’s something we’ll have to be aware of.

"I’ll definitely be targeting this game, if you look at what happened in the two games last year. A very tough two weeks ahead for us."

The South African is hoping for another special European atmosphere in Limerick, despite the early kick-off time of 1pm on Sunday.

"The whole week you get the vibe around the stadium. We change our kit for the week, going into the European gear and everybody knows it’s Europe.

"The feel and the buzz, you pick it up immediately when you walk in.

"It will be another big crowd. We talk about the 16th man and that is so important. Our mantra is 'we all rise by lifting each other' and it will be no different on Sunday against top-quality opposition.

Follow Munster-Castres live with our match blog on rté.ie/sport and on the News Now app. Live commentary on a Game On special from 12.55 on RTÉ 2FM