Manchester United are waiting to discover the full extent of Michael Carrick’s ankle injury amid reports the midfielder could be sidelined for a month.
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The 32-year-old was hurt in extra time of Wednesday’s Capital One Cup semifinal against Sunderland, when he was replaced by Phil Jones.
And the defending champions are left to hope he is not out for a crucial few weeks which includes a Premier League trip to Arsenal and the Champions League last-16 tie against Olympiakos.
Carrick’s injury also prompts the question if United will step up their search for a central midfielder in the final week of the transfer window.
Manager David Moyes has scouted extensively across Europe and has watched the Juventus trio of Paul Pogba, Arturo Vidal and Claudio Marchisio as well as Atletico Madrid’s Koke.
United have also been linked with Inter Milan's Freddy Guarin, who is a reported target for Chelsea, possibly in a swap deal with Javier Hernandez.
Carrick, who was shortlisted for the PFA Player of the Year award last season, is the only automatic choice in the United midfield but was out for six weeks in November and December with an Achilles injury.
However, Moyes could welcome Marouane Fellaini back soon. The Belgium international, who has undergone surgery on a wrist injury, has not played since the defeat to his former club Everton on Dec. 4.