Inter's Diego Milito will not be available for the Sunday clash versus Udinese and may also miss Palermo's visit to San Siro.
The 31-year-old has looked more sharp as of late, scoring in his last two matches, but suffered a setback when he was forced off the pitch after just 20 minutes in the 3-2 win on Wednesday against Cesena.
"Tests have shown a first degree strain to the biceps femoris," confirmed part of a statement released by the club.
The prognosis is the Argentine striker will miss approximately ten days of action, meaning there is the possibility he may also fail to regain full fitness by the time the Nerazzurri host Palermo on January 30.
Milito had played a hand in two goals against the Seahorses, assisting Samuel Eto'o and scoring one himself, and Inter president Massimo Moratti admitted the former Real Zaragoza star's exit was part of the reason the Nerazzurri's early dominance subsided.
"There was a decrease in our play during the match, also in the security of obtaining the result," admitted the club supremo.
"Milito's exit perhaps changed the match a bit."
'Il Principe' has five goals in 13 Serie A appearances in 2010-11.