St Helens hooker James Roby is facing more time out with a new ankle problem, giving England coach Steve McNamara another concern ahead of the World Cup.
Having recently returned from a 10-week absence, the 27-year-old damaged his other ankle in a win at Castleford.
And it is feared Roby could be missing for the majority of the season.
Saints coach Nathan Brown told BBC Radio Merseyside: "It's not looking good. They think it's the same injury on his other foot."
St Helens coach Nathan Brown“If we hadn't have got the result, it wouldn't have changed where I think the club's at”
England play Australia in their first World Cup match on 26 October and if Roby were to be ruled out for a similar period of time as his initial injury, it would leave him with little over a month to prove his fitness.
Stand-off Gareth Widdop is already a doubt for the tournamentafter dislocating his hip while playing for Melbourne Storm in June, and captain Kevin Sinfield is currently out of action with a broken thumb.
Sunday's 40-24 success was a welcome one for Saints, who werepublicly backed by chairman Eamonn McManus in the build-up to the game following a poor run of form.
Brown, whose side are now up to seventh in Super League, continued: "It was good to get the result - [but] if we hadn't got the result, it wouldn't have changed where I think the club's at.
"I'm quite comfortable with where we're heading. We had another local boy [Greg Richards] who made his debut today. All the kids are good, long-term players for the club.
"The key for us to go forward for the rest of the year is to play consistently well."
