User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-24421137-20150115052346/@comment-16281343-20150116000515

There are minor mistakes here and there.

The one needed to correct that I saw (I just skimmed what you wrote, sorry) is the kneeing part on Strada. The spoiler at the very top isn't clear and can be easily interpreted as Xenovia using her knee to defeat Strada ... which isn't the case when I read that part.

What really happened is Xenovia dual wielding True Excalibur and Durandal clashed against Strada's Durandal replica. A great collision ensued so powerful that cracks appeared on Issei's and Saji's armors. Strada was then seen on his knee.

Strada was ultimately defeated because of his age.