I have to reread it, but I don't remember the fight starting off with a weakened Firelord.
He wasn't weakened in the beginning.
He did seem rocked after he crashed through some buildings earlier in the fight, but he recovered quickly.
Before the speedblitz that put him down, Firelord was caught in the explosion of a gas station. When the dust cleared, Firelord was on the ground, unmoving. That turned out to be a trick to lure Spidey into the open. He wasn't really hurt.