Don't worry

He then said, "How am I feeling? Very tired."

And the masseuse said, "I understand. The Black Fists always overwork themselves at this time of the month."

Gen then said, "I imagine so, but I bet you I'm more tired than any of the other Black Fists. After all, I've barely reached this rank, and I'm already trying to get to the next one."

And the masseuse said, "That's true. Of all of them, you're probably the most tired. Do you think that's why you lost your fight?"

Gen then said, "Hmm? Did you see my fight?"

And the masseuse said, "I always watch all the arena fights."

Gen then said, "Wow, I wasn't expecting that."

And the masseuse said, "Fufufu, nobody expects that."

Gen then said, "Well, to answer your question. It wasn't because I was tired that I lost. My opponent was just much stronger than me. Unfortunately, there was no way I could have won that fight even if I had been at my peak."