Jaku knew that the only way that he could win was if he stopped being lazy. He had to suppress that desire of his to sleep through this arduous ordeal and let the time pass in his dreams.
By letting go of his desire for just a moment, for just this tournament, he would bring victory to himself, Michael, and the whole of the Reborn company.
He had no care for what other people thought of him. He was too lazy to do that. However, he could see in the eyes of everyone in the tournament that it wasn't just him they were underestimating. It was the Reborn company as well, and by extension, Michael.
"Jaku wouldn't have to fight four opponents at the same time if his company had other swordsmen to spare."
"Does anyone even know who they are? It says here they're called the Reborn company. Never heard of them."
"If they don't even have a single Maugnetic swordsman, then they must be a small, low-time company. All they have is a demi-human."
