UFC title bouts are usually evenly fought, closely contested matchups that bring out the best in both competitors. However, in MMA it only takes one punch, kick or submission for a champion to be humbled.From huge upsets to hometown heroes getting it done, here are 5 times UFC champions got destroyed inside the octagon.#5 Jessica Andrade vs Zhang WelliZhang Welli celebrating her title victoryNewly crowned UFC strawweight champion Jessica Andrade faced hometown challenger Zhang Welli in her first title defense in Shenzen, China in August 2019.The Chinese challenger came into the fight undefeated in the UFC with an impressive 19-1 professional record. The champion Andrade had recently won the title from Rose Namajunas in her home country of Brazil.In front of the raucous local crowd, Zhang took just 42 seconds to knock out Jessica Andrade to become the new UFC strawweight champion and the first Chinese titleholder in UFC history.The Brazilian’s uber-aggressive tactics did not pay off as she walked right into a massive right hand before being finished off with a flurry of elbows and knees. A flawless victory from the Chinese star.Weili Zhang vs Jessica Andrade #UFCChina pic.twitter.com/KzC4XcqBuT— MMA Gone Wild🥋 (@mmagonewild) August 31, 2019#4 Cain Velasquez vs Junior Dos SantosJDS - new UFC heavyweight championThe first-ever UFC event on network television 'UFC on FOX' in November 2011 was headlined by a heavyweight title bout. American UFC champion Cain Velasquez faced Brazilian challenger Junior Dos Santos.The highly anticipated main event championship fight lasted just 1 minute and 4 seconds. Challenger Dos Santos landed a massive overhead right that dropped Velasquez. He was unable to recover as JDS followed up with vicious punches on the ground.This powerful performance from Dos Santos was watched by 8.8 million people in the United States alone.Velazquez would later regain the title in a rematch with JDS in dominant fashion and win their trilogy fight via TKO.Nov12.20119 years ago today,Junior dos Santos knocked out Cain Velasquez on the UFC's inaugural event on FOX to become the Heavyweight Champion. pic.twitter.com/KJTZiGK3sn— MMA History Today (@MMAHistoryToday) November 13, 2020#3 Cris Cyborg vs Amanda NunesUFC 232 Cyborg v NunesUFC 232 on December 29th, 2018 played host to a women’s champion vs champion co-main event between Cris Cyborg and Amanda Nunes.The Brazilian champions were competing for Cyborg’s UFC 145 pounds featherweight title.Nunes, the bantamweight champion, had not lost since 2014 while Cris Cyborg had not tasted defeat since her pro-MMA debut way back in 2005.The super-fight lived up to expectations... for as long as it lasted.Amanda Nunes was able to avoid the power punches from Cyborg, dropping the featherweight champion not once but twice against the octagon fence to shock the world in only 51 seconds.Now the first-ever UFC female ‘champ-champ’, Nunes cemented her place as the greatest female MMA fighter of all time.THE BADDEST WOMAN ON THE PLANET!!!@Amanda_Leoa #UFC232 pic.twitter.com/miyNd7xBwb— UFC (@ufc) December 30, 2018#2 Ronda Rousey vs Holly HolmUFC 193: Rousey v HolmOne of the biggest upsets in UFC history happened at UFC 193 in Melbourne, Australia. Long reigning, undefeated women’s bantamweight champion Ronda Rousey squared off against undefeated challenger Holly Holm.In front of a world-record crowd for a UFC event, Holly Holm completely dominated Rousey from the opening exchange until the finish early in round 2.Ronda was very aggressive but this played perfectly into Holm’s counter striking style. The challenger finished the fight with an unforgettable head kick that will be replayed on UFC broadcasts for years to come.Five years ago today, @HollyHolm shocked the world by knocking out Ronda Rousey with a picture-perfect head kick at UFC 193 ⚡️🌏Holm was a big underdog against Rousey, who had never lost to that point in her career. pic.twitter.com/hE6iDqDmCQ— ESPN MMA (@espnmma) November 14, 2020#1 Jose Aldo vs Conor McGregorConor McGregor vs Jose AldoThe Notorious Conor McGregor delivered the fastest knockout in a UFC title bout at UFC 194 in December 2015.In just 13 seconds, McGregor shocked the MMA world with a beautifully placed left hand to the jaw of Jose Aldo.Conor McGregor vs Jose Aldo at UFC 194 on December 12, 2015 in Las Vegas, NV. #DWCOTD pic.twitter.com/1h4KEjafRs— danawhite (@danawhite) March 4, 2016The featherweight championship fight was the culmination of a bitter rivalry between the Irishman and long-reigning Brazilian champ Jose Aldo.Both fighters refused to touch gloves at the start of the bout and as Aldo attempted his first real offense of the fight he was clipped by a left hook which knocked him out cold. McGregor followed up with hammer fists but the fight was over after the hook landed.It was perhaps the greatest moment in Conor McGregor’s UFC career.