Hermione’s family, not Ron’s, come to watch the Third Task. During the task, Harry struggles a bit because he is not using his wand enough; Diggory saves him, but they end up helping each other, and so Diggory does the "you take it" at the end. This Harry, however, is mercenary enough to not choose to honorably tie with Cedric. Ironically, this is a much better outcome for Cedric.