Ricardo Kaka will likely miss Milan's UEFA Champions League clash against Arsenal later this month due to injury, according to the player's spokesman. "He has been treating this knee pain with physiotherapy and anti-inflammatories," Diego Kotshco told Globoesporte. "It is not appropriate to intervene surgically, but he probably will not be fielded against Arsenal." Kaka's compatriot Alexandre Pato, who was promising in his few matches with the European champions, is also doubtful due to an ankle injury. The news will come as a blow to Milan coach Carlo Ancelotti, who will have to prepare his relatively aged team to a tough battle against Arsenal's in-form youngsters. The Rossoneri have lost hopes of competing for the Serie A title and were knocked out of the Italian Cup. Their only realistic target this season is the Champions League. Milan face Arsenal in the first-leg of the competition's round of 16 on the 20th of February.