Two late breakaway goals from Matheus condemned the Gunners to defeat - after they had been harshly denied a penalty as Carlos Vela was booked for diving having seemingly been tripped by Alberto Rodriguez To make matters worse, Fabregas pulled up in the second half with a hamstring injury, while Eboue suffered a knee injury in a late tackle that infuriated Wenger. The manager told Sky Sports 2: "We are going through a period where we have bad luck, we had Eboue kicked off the park without any punishment and we also had the penalty turned down. "What was the fifth official doing? We have another proof that it is absolutely useless, this system. "Then when we were 10 against 11, we made a mistake at the back, there was a minimum of communication and that's where we were punished." Injuries added to the pain of the defeat as, in addition to the loss of Eboue, Fabregas' fitness problems resurfaced in the second half. "It is a hamstring injury - on the other leg - so it's difficult to predict how long he will be out for," Wenger continued. "Eboue will be out for a few weeks because he took a very bad tackle, unpunished. It is a medial knee ligament injury." The Gunners now need to beat Partizan to be sure of progressing from the group and their manager admitted: "It is a concern, but we'll make it."
