The young Spanish forward sealed his move to the Serie A champions on Saturday after a €20 million deal was agreed with former club Real Madrid.
Just two days removed from the ink drying on his five-year contract in Turin, the 21-year-old is already in the treatment room after complaining of pain in his knee during training on Monday.
"During training this afternoon Alvaro Morata has reported a sprain in his left knee," Juventus confirmed on their official website. "His condition will be evaluated tomorrow."
Morata will be hoping to receive the all clear from the medical staff as he looks to settle quickly at Juve and fight Carlos Tevez and Fernando Llorente for a regular starting spot under Massimiliano Allegri.
Juve's new coach replaced Antonio Conte on Wednesday and made Morata his first signing as he looks to continue the period of success that has brought three-consecutive Scudetti.
A lack of regular first-team football hampered his progress in Madrid, he was thought of highly enough for Real to retain an option to buy him back until the end of the 2016-17 season.
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