Paul Pogba will miss Manchester United's FA Cup fifth-round clash with West Ham and the next few weeks.
The 27-year-old was forced off towards the end of the first half of Saturday's 3-3 draw against Everton with a thigh injury that manager Ole Gunnar Solskjaer has confirmed will see him miss "a few weeks definitely".
"It's an injury that will take a few weeks to heal," he told MUTV.
"He's just started his recovery, working with the medical staff and we'll get him back as soon and as safely as we can.
"Of course, Paul has been very important for us and we're not going to take any risks. (So it is) a few weeks definitely.
"You never want to be injured and, especially, now Paul was really finding his form and enjoying his football. For us, we just have to take as many points and wins as possible, when you lose players.
"We've been very healthy and strong for a long period so we can't moan too much."
The United boss does not expect defender Eric Bailly to be fit on Tuesday, while Phil Jones has yet to feature this season due to a knee injury.
West Ham have Tomas Soucek available after the Czech midfielder's red card against Fulham was overturned.
Michail Antonio will be assessed after coming off at Craven Cottage with fatigue.
Jesse Lingard cannot play under the terms of his loan deal from United and Arthur Masuaku is around a month away from returning following knee surgery.
Manchester United provisional squad: De Gea, Henderson, Grant, Wan-Bissaka, Williams, Tuanzebe, Lindelof, Maguire, Shaw, Telles, McTominay, Fred, Matic, Van De Beek, Mata, James, Diallo, Fernandes, Greenwood, Rashford, Martial, Cavani.
West Ham provisional squad: Fabianski, Fredericks, Balbuena, Ogbonna, Cresswell, Rice, Noble, Lanzini, Fornals, Benrahma, Yarmolenko, Trott, Coufal, Dawson, Diop, Johnson, Soucek, Bowen, Odubeko, Antonio.
