Zack Steffen has not yet joined up with his national team due to the back problem that kept him out of the Southampton game.
The Manchester City goalkeeper was absent from the squad that travelled down to St Mary's, with youngster Cieran Slicker stepping in, after it was deemed he wasn't fit enough to make the trip.
Steffen's injury wasn't thought to be serious enough to rule him out of the three World Cup qualifiers coming up for the USA, but has troubled him enough to delay him linking up with the rest of the US Men's National Team (USMNT) players and their coach Gregg Berhalter in their training camp in Ohio. A statement from USMNT said that Steffen's situation would be assessed on a daily basis.