Don't see how Madara wins this. Unlimited chakra makes Hiruzen too OP, and while he and Madara are likely equals or close to in CQC/tai, Enma would give Hiruzen the leg up as Hiruzen has methods to counter all of Madara's techniques and won't run out of chakra doing so. Hiruzen also can create extremely durable shadow clones, and with his unlimited chakra can make as many as he wants. Sharingan genjutsu won't work on someone with Hiruzen's experience. Unless I'm just blanking on something Madara is capable of, not sure how he'd take this. Hiruzen would just overwhelm him.