Saturday 1 April 2017 00:10, UK
Manchester United have announced midfielder Juan Mata has undergone surgery on a groin injury.
Mata is United's second leading scorer this season behind Zlatan Ibrahimovic, with 10 goals.
His absence comes at the worst possible time for Jose Mourinho with United facing nine games in April as they seek to break into the top four and continue their Europa League campaign.
A club statement said: "Juan has had surgery for a groin injury. Further updates on his recovery will follow in due course."
Mata's injury comes as another blow for Mourinho, who will already be without a number of key players for Saturday's visit of West Brom to Old Trafford.
Ibrahimovic and Ander Herrera are still serving serving domestic bans, while midfielder Paul Pogba will be absent with a hamstring injury.
Defenders Phil Jones and Chris Smalling were forced out of the England squad after sustaining what Jose Mourinho called "long-term injuries" and Marouane Fellaini is a doubt.
When confirming the injury lay-offs for Smalling and Jones on Friday, Mourinho insisted United must not dwell on their mounting problems.
"We cannot be here crying or speaking about the players who are not available to play," said Mourinho.
"You know Zlatan and Herrera are suspended, you know that Herrera is two matches banned for that episode against Chelsea.
"You know what happened in the English national team with Smalling and Jones.
"You know that we have also Pogba injured, but I repeat they're not important.
"The important players are the ones that are ready to play and the ones I trust and the ones who are going to give us everything tomorrow to try to keep us in the fight for the top four."