It's bad to obsesses over someone.
Ivan coudn't stop thinking about how he was going to defeat Miles in the science fair.
Ivan wants to enter the science fair.
Ivan focuses on his actual project for the fair rather than his rival.
Ivan obsesses over how he's going to win that he doesn't spend time on his project.
Ivan's project wins the science fair by a landslide.
Ivan comes in second place behind Miles in the fair.