Patrick Dorgu is a major doubt for Denmark's upcoming World Cup play-off games, including a potential final against Ireland.
The Manchester United winger will be out for up to 10 weeks, after suffering a hamstring injury in their weekend win at Arsenal.
Dorgu has been in excellent form for the Red Devils and found the net in that 3-2 victory at the Emirates.
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Aston Villa have agreed a deal to re-sign former midfielder Douglas Luiz on loan.
The 27-year-old is currently on loan at Nottingham Forest from Juventus.
The Brazil international left Villa Park for the Italian club 18 months ago for around 50-million euro.
Chelsea were also interested in Luiz but he opted for Villa in a deal which includes an option to buy.