Ralph Hasenhüttl and Saints will head into Saturday's Premier League visit of Tottenham Hotspur with no new injury concerns, the Austrian confirmed on Thursday afternoon.
There had been a hope of getting top-scorer Danny Ings over the fitness line in time for this weekend's match but Hasenhüttl and his staff have opted for caution, electing to give Ings as much time as possible to make a full recovery.
A three-week break will follow Saturday's meeting with Spurs, a period in which the Saints boss anticipates reintroducing his number nine to first-team action in a training ground friendly as well as preliminarily preparing his team for the crunch away clash with Brighton at the end of the month.
"Danny is not in the group at the moment," he said in his pre-match press conference. "We didn’t take any risks, we want to give him the time to come back during the three-week break. We will play a friendly against a Championship team and he can play for 45 minutes maybe in that time and build up his fitness."
Elsewhere, there was good news for Mario Lemina who trained with the rest of the squad for the first time on Thursday since reporting an abdominal strain at the end of December.
"This is a new situation for me, missing a game for the cup. To have such a long break during the season is unnatural. We will have everyone here for the first week and then not for the second because some will leave for their national teams.
"In that first week, we will take a few early steps towards the Brighton match but when they go to their national teams maybe they will forget what we worked on. We will try to find some rhythm but it’s not easy."