Robin van Persie injury: Manchester United striker ruled out for 'four to six weeks' with sprained knee and will miss Tuesday's Manchester derby and Bayern Munich ties
Dutchman was carried off on a stretcher after scoring a hat-trick against Olympiakos to send United through to the Champions League last-eight
Robin van Persie has been ruled out for "four to six weeks" with a sprained knee, Manchester United have confirmed.
Van Persie was carried off on a stretcher in the dying minutes of United's 3-0 win over Olympiakos, in which scored a hat-trick.
The Netherlands striker will miss the Champions League quarter-finals against Bayern Munich and could be sidelined for as many as six Premier League matches.
A tweet from United read: "Following further investigation, Robin van Persie has a sprained knee, which will keep him out for around four to six weeks."
Manager David Moyes had earlier suggested that there could be bad news regarding the former Arsenal forward.
"We're getting Robin re-scanned again today," the Scot had said.
"We're just not quite conclusive on everything we've seen yet. We want to just check that out and be sure. He won't be available for (Saturday's) game (against West Ham). But we'll try to give you some update when we can on the outcome of it.
"We've got a lot of games coming up and we need all our players fit and available."
Latest in Sport
Riyad Mahrez to Arsenal: 'No price' is big enough to convince Claudio Ranieri to sell Algerian hotshot
Arsenal transfer news: Arsene Wenger 'optimistic' of making signing, Grzegorz Krychowiak and Edinson Cavani linked
Barbarians vs Samoa interrupted by sprinklers as fans criticise lack of Wi-Fi and poor seating at West Ham's Olympic Stadium
Chelsea 1 Crystal Palace 2: Jose Mourinho uses forward Kenedy at left-back as frustration with Chelsea defence grows
Chelsea 1 Crystal Palace 2: Blues' Twitter account jumps the gun, seconds before Joel Ward goal seals Eagles' victory
- 1 Rules on 5p plastic bags likely to lead to arguments at the check-out
- 2 Hulk Hogan wants to be Donald Trump's running mate in the US Presidential election
- 3 Blood Moon and Supermoon: September to bring brightest – and dimmest – full Moon of the year on same night
- 4 News agency criticised for describing Amal Clooney as 'actor's wife' in coverage of human rights trial
- 5 David De Gea to Real Madrid: Real finally get their man with £29m bid for Manchester United goalkeeper
Climate change: 2015 will be the hottest year on record 'by a mile', experts say
'Women only' train carriages: Jeremy Corbyn unveils radical move to tackle public harassment
Black holes are a passage to another universe, says Stephen Hawking
Tony Blair attacks Jeremy Corbyn's 'Alice In Wonderland' politics
Theresa May says migrants should be banned from entering the UK unless they have jobs lined up
Iain Duncan Smith 'should resign over disability benefit death figures', says Jeremy Corbyn