The Arsenal midfielder has been sent off twice this season.
Jan Vertonghen is expected to return within four weeks, while Erik Lamela will be reassessed on Friday.
Southampton reached the EFL Cup final without conceding a single goal.
Asmir Begovic future uncertain as Blues hit dead end in search for replacement.
Arsenal boss stood in the tunnel after getting his marching orders in the win over Burnley.
Director of football Les Ferdinand confirms deal is 'close to being completed'.
Catalans have a 1-0 advantage from the reverse fixture played at San Sebastian.
Los Blancos were knocked out in the quarter-finals after a 2-2 draw at Balaidos on Wednesday night.
Liverpool have lost their last two games at home.
Welbeck has played just 21 minutes of football in all competitions since his injury return.
Martial was left out of Manchester United's match day squad for the draw against Stoke.
Wenger is likely to be handed a hefty ban for his touchline antics against Burnley.
Liverpool boss believes his side should have been awarded a penalty during Wednesday night's EFL Cup loss.
Sport reported in December that he had a deal in place to move to the Nou Camp in the summer.
Liverpool winger joined the Tigers on loan this week following a frustrating spell with Sporting Lisbon.
Shane Long nets in second-half stoppage time to seal the Saints' passage to Wembley.
Oxford has not featured in the Premier League this season.
The 29-year-old has already been the subject of numerous bids this window.
The 19-year-old currently captains United Under-23 side.
Former Real Madrid keeper is currently on loan at the Catalan side from AC Milan.
Lanzini has been in fine form in recent matches and can banish Payet blues.
Portuguese head coach also hopes to keep Robert Snodgrass at the KCOM Stadium beyond next week.
The Swiss midfielder is facing a four-game ban after another red card.
Gordon previously played in the Premier League with Sunderland.
Andres Iniesta, Sergio Busquets and Rafinha are ruled out for the second leg of the quarter-finals.
Manchester United registered a 2-0 win over Hull City in the first leg at Old Trafford.
The Argentine international missed the 1-1 draw with Stoke through illness.
Everton have signed the German on loan until the end of the season.
Chief executive Hans Joachim-Watzke says huge offer would trigger talks with Gabon striker.
Mason is currently recovering in hospital after suffering a skull fracture.