Azerbaijan's midfielder #15 Abdulakh Khaibulaev (L) and France's midfielder #14 Adrien Rabiot (R) fight for the ball during the FIFA World Cup 2026 Group D European qualification football match between France and Azerbaidjan at the Parc des Princes Stadium in Paris. AFP
Milan said that tests "revealed a tear to the soleus muscle", adding that Rabiot would be "reassessed in around 10 days".
That timeframe rules the France midfielder out of Sunday's clash with Fiorentina at the San Siro and the trip to Pisa the following Friday.
Rabiot signed for Milan on transfer deadline day after being offloaded by Marseille in the wake of a dressing room brawl with Jonathan Rowe, who is now also in Italy with Bologna.
The 30-year old scored in a 3-0 World Cup qualifying win over Azerbaijan on Friday.
Milan sit third in Serie A on 13 points, two behind league leaders Napoli and Roma.
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