Robin van Persie will miss Manchester United's trip to West Ham on Saturday with a knee injury, manager David Moyes has confirmed.
The Dutchman suffered the injury after scoring a hat-trick in Wednesday's 3-0 UEFA Champions League win over Olympiacos, a result that saw United through to the last eight where they will meet Bayern Munich.
However, the setback means that Van Persie will miss the visit to Upton Park, and Moyes is not clear as to the extent of the problem.
"We're getting Robin re-scanned today (Friday)," he said. "We're not quite conclusive on everything we've seen."