Is the bit from 'Pacquiao' grammatically correct?

[Pambele]

"All things considered, this one looks desperately tight but Marquez showed he could handle talented southpaw punchers six months ago against PACQUIAO, even in defeat, and one can hardly class it a defeat given how well the Mexican fought."

Is the bit from 'Pacquiao' grammatically correct? My instincts flag a warning, for some reason.

[Skrej]

Aside from the fact that every letter of PACQUIAO is capitalized, the sentence is fine, if a bit long winded.
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Native speaker but not a perfect speaker.
But completely fluent in over six million forms of Teflese.

[Pambele]

I spelt the surname deliberately in caps, as it is from there I am confused. The clause 'and one can hardly class it a defeat given how well the Mexican fought' feeds off 'even in defeat', of course.

So it is OK to do that.