Shockwaves Through Sports: 15 Unbelievable Upsets That Redefined History!

Holly Holm Knocks Out Ronda Rousey, UFC 193

In UFC 193, Holly Holm, a former boxing world champion, knocked out the undefeated Ronda Rousey to win the women's bantamweight title. Holm's victory stunned the MMA world and showed that even the most dominant champions can be defeated.