The Magpies manager said: "Sam's in discomfort, but it is not a twist or a tear, it is an impact injury, so we have to feel confident that the muscle is relaxed enough and it can do its job and not stay contracted the whole time.
"We have a bit more time with that so we will see how he goes, but fortunately it was not a break or a tear. We will have to do a fitness test tomorrow and see where we are then.
“Sam has played consistently well over the course of the season and Tiernan has gone in and done incredibly well, and then I thought Archie also did well at the weekend.
"It is the perfect problem for me and I need to weigh up all things now and try to pick the most sensible decision and the one that is in the best moment to play the game - and that will be the one that goes in."