Saints could give James Wilson another week off as he continues to recover from the head injury sustained against Ospreys on October 25.
Kiwi centre Wilson was forced off in the ninth minute of the Champions Cup clash and could not return to the field, being replaced by Jamie Elliott.
He missed last Saturday’s 37-23 LV= Cup victory against Newcastle Falcons and is a doubt for Friday’s trip to Scarlets in the same competition.
And Saints forwards coach Dorian West said: “He’s been training, but it’s one of those things when you’ve had a bang on the head that sometimes it takes a few weeks to get over and the way the medical teams work with the protocols it’s all pretty tight.
“You have to be at certain stages at certain times of the week. We’re hopeful he’ll be recovered in time to play on Friday but if it’s another week he needs, that’s what he’ll get.”
Samu Manoa could be back in contention for Saints after playing in the USA’s 74-6 defeat to New Zealand in Chicago last Saturday.
West, speaking on Tuesday, said: “Samu returned on Monday night. He’ll still be in bed knowing him, getting over that long flight and a tough game at the weekend.
“We’ll have a sit down with him and see what he’s doing.”
And on Sam Dickinson, the No.8 who has not played a competitive game this season after having neck surgery, West said: “He’s progressing well.
“You never quite know where they’re at until you get them on the pitch, hitting some bags and making some tackles.
“I know he’s been looked after well, he’s positive himself and looking forward to playing again.”
Alex Corbisiero (shoulder), George Pisi (hamstring), Luther Burrell (hand) and Stephen Myler (hamstring) are all unavailable for Saints this weekend.
But Calum Clark and Lee Dickson, who were released by England on Tuesday, could come back into contention.