not 100% but i think he has a counter for it by the way i have to check manga again cuz he went against kagami when he did it and i think kagami hit the zone on the next level but dont quote me been a min since i read it
ill look it up and respond later for facts
this is what was said
Aomine then comments that the Zone-possessed Kagami can still be beaten by Akashi, but the latter may have difficulties to mercilessly defeat Kagami. Hence Akashi would have to follow his style: to use tactics that have possibilities of failing. This means that even if the current Seirin is playing very well, it is not to the extent that will force Akashi to use those tactics
also he can enter the zone
Akashi enters the Zone once his trigger for entering the Zone is fulfilled and that is to lose all faith in his teammates and deem them worthless.
[54] Once in the Zone, Akashi's speed and reaction time have increased. Akashi passes Kagami easily with the latter not managing to keep up with Akashi. Akashi uses his Ankle Break on Izuki and Hyūga who went to mark him and scores the basket. Seirin calls for a time-out where they entrust all their hopes to Kagami.