User blog comment:TrueHeavenlyDragonGod/Issei's belongings/@comment-99.28.128.211-20140302110708/@comment-1359322-20140304010601

Well if you reread the story properly then you would know.

Anyway regarding the fight against Sairaorg, Issei could've just opted to use long ranged attack against Sairaorg from a distance while protecting Rias but he didn't, Issei opted to face Sairaorg in a fist fight which is clearly Sairaorg's alley. He even went and asked Sairaorg to use Regulus after Sairaorg refused to use it.