Underarm Bowling Incident — Australia vs. New Zealand (1981)

The underarm bowling incident on February 1, 1981, at the Melbourne Cricket Ground saw Australian captain Greg Chappell instruct his brother Trevor to roll the final ball along the ground, preventing New Zealand from hitting a six needed to tie. New Zealand needed six runs; the underarm ball ensured no bat could produce that, and Australia won by no runs. Trevor Chappell later apologized, but the incident remains a scar in cricket history, with New Zealand blocking similar tactics in 1982 rule changes.