Au fought back in the second to draw level .
The Egyptian soon rediscovered his rhythm to pull through with a 12 - 10 , 11 - 13 , 11 - 8 , 11 - 8 triumph .
Au fought back in the second to draw level , but the Egyptian soon rediscovered his rhythm to pull through with a 12 - 10 , 11 - 13 , 11 - 8 , 11 - 8 triumph .