Juventus are sweating over the fitness of Claudio Marchisio ahead of this weekend's Derby d'Italia against Inter.
The Italy international midfield "overworked" his left adductor muscle in Saturday's 3-1 win over Cagliari.
He underwent a series of tests yesterday to ascertain the severity of the injury.
Juventus' medical staff hopes to recover Marchisio in three or four days' time, but the doubt remains.
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