Stephens joined Saints on loan from Oldham last week and could make an immediate debut for Nigel Adkins` side with an injury concern hanging over Adam Lallana while fellow midfielders Alex Chamberlain and Morgan Schneiderlin miss out.
Lallana should recover from a groin injury in time but teenage star Chamberlain rolled his ankle against Charlton a fortnight ago and is possibly looking at a couple of weeks on the sidelines.
Schneiderlin is still out with a knee injury and joins winger Lee Holmes (ankle) and striker David Connolly (groin) in the treatment room.
Midfielder Oscar Gobern serves the final game of the three-match ban he received for his red card at Bournemouth.
Source: PA
Source: PA