LOL! In fact, it's a reference to The Cricket Term, a school story by Antonia Forest. Cricket is a particular obsession of the girls throughout that book. Talking about the cockiness of the fifth form team, they debate the meaning of hubris and nemesis, concluding that "nemesis is what clobbers you if hubris is what you've got". When they're surprisingly beaten by a poorer team from the Sixth, two of our heroines are seen cavorting around yelling, "Hubris! Nemesis!" So they are entirely linked with cricket in my mind :-)