Mourinho told a news conference that neither Rooney nor defender Phil Jones would be able to play in Wednesday's Europa League game at Saint-Etienne.
The mood is upbeat at Man United with Anthony Martial & Marcus Rashford evoking memories of 2005-06, when Wayne Rooney & Cristiano Ronaldo developed.
Southampton need to forget Wembley and Manchester United and focus on their league form as they're in danger of facing a relegation battle.
Andre Marriner will referee the EFL Cup final between Manchester United and Southampton on Feb. 26.
Southampton defender Virgil van Dijk faces up to three months on the sidelines and will miss the EFL Cup final against Manchester United.
Craig Burley questions Jose Mourinho's behaviour after the Man United boss said his side drew a match they lost.