Juventus striker Amauri is set to miss three to four weeks with a thigh injury.
The 29-year-old was substituted during yesterday's 0-0 UEFA Europa League draw with Ajax, which saw them book a last-16 clash with Fulham on aggregate.
A statement on the Juventus website read: "This morning Amauri underwent tests following the injury suffered yesterday during the match against Ajax. The tests confirmed the diagnosis made after the match. The prognosis is of 25 days."
The injury looks certain to rule him out of both legs of the tie against Fulham.
He joins Gianluigi Buffon on the sidelines, with the Italy goalkeeper set to be out for a month after also suffering a thigh injury.