Tsubaki the naive hard worker is going to have a hard time marking a diva player like Hanamori who can probably turn it on when he wants to, but also is experienced at pulling fouls. Don't you really have to be an egomaniac to play as a pure striker? Tsubaki's personality is definitely more attacking central midfield, at least right now. Also in a previous chapter there was hints Hanamori's actually hurt for real or has an ongoing problem, I'm sure that won't become relevant at some point. :)