Manchester United striker Robin van Persie has damaged his ankle ligaments.
Manager Louis van Gaal is expected to confirm the injury at his lunchtime press conference today.
United are still to establish how long the striker will be out, although it may be around three to four weeks.
Dutchman Van Persie left Swansea’s Liberty Stadium on crutches last Saturday with his right ankle in a protective boot and had scans at the start of the week.
The 31-year-old picked up the injury as he fell awkwardly while putting over a cross late in the 2-1 defeat. United had used all three substitutes and Van Persie was reduced to a walking role as they pushed for a late equaliser.
Radamel Falcao and James Wilson will vie for a starting place against Sunderland on Saturday.
United will listen to offers for right back Rafael da Silva this summer.
The Brazilian defender has only played nine Barclays Premier League games under Louis van Gaal and has not appeared at all since the FA Cup tie at Yeovil in January. – Daily Mail