Manchester United and England striker Marcus Rashford faces a lengthy lay off after his manager Ole Gunnar Solskjaer confirmed on Sunday he had suffered a stress fracture.
"He's suffered a bad injury," said Solskjaer. "Yeah it's a stress fracture, it happened against Wolves. It's not happened before, it happened there and then.
"He'll be out for a while. He won't be back until after the mid-season break. Normally six weeks to heal, but I'm not a doctor, and then he needs rehab after that probably," he told Sky Sports.
United are operating with a relatively thin squad but are particularly short of options in the attacking area with no alternatives to Anthony Martial and Mason Greenwood.
Solskjaer suggested that the loss of Rashford for up to six weeks, added to the need to bring in some new faces to the club.
"We're always looking at chances to improve the squad - with Marcus out for a while we have to look at it closely. We might look at some short-term deals. We are looking at numbers," he added.
As well as being a set-back to a United squad short of attacking options, the loss of Rashford is a blow to England manager Gareth Southgate whose main striker Harry Kane is also sidelined through injury.
United are fifth in the Premier League, 30 points adrift of Liverpool after a 2-0 defeat to the leaders at Anfield on Sunday but Solskjaer was pleased with the display his side gave against the European champions.
"The players gave us everything. Today we hung on a bit at the start of second half, but the last 25-30 mins we pressed them and pushed them back. I'm disappointed with conceding from a corner and with the last kick - but very many positives," he said.
"I felt in the second half we performed really well against a good team and at a difficult place. We didn't have quality with our finishing or last pass. (Midfielder) Fred was absolutely top and (goalkeeper) David de Gea. As a team we worked together as a unit," he said.
Liverpool's charge towards what would be a first league title in 30 years continued as a 2-0 victory over arch rivals Manchester United took them 16 points clear at the top of the table.
Ole Gunnar Solskjaer believes Liverpool will win the title this season because they are the best team in the Premier League, but he argues that they will have to do it again and again to be regarded as the best ever.
Twenty-four hours after Pep Guardiola had joked that Roy Hodgson must have been compelled by boredom to continue coaching into his advanced age, Wilfried Zaha popped up in the dying seconds of this entertaining fist fight to remind the Catalan of the addictive and heart-stopping emotions thrown up by managing in the Premier League.
For all the improvements Arsenal have made under Mikel Arteta, their inability to see a game out remains chronic. They lost a lead here for the third time in his six-game tenure, continuing a theme that has dogged a miserable Premier League campaign and makes a mid-table finish increasingly likely.