on 1 November 2019 due to the ongoing search for his missing step-daughter, and he was replaced by Jairzinho Rozenstruik. He lost the fight via knockout in the last four seconds of the fifth round after being up on all three judges' scorecards (39–37, 39–37, and 40–36). The bout with Walt Harris was rescheduled to take place on 11 April 2020 at UFC Fight Night: Overeem vs. Harris. Due to the COVID-19 pandemic, the event was eventually postponed. The fight was rescheduled to 16 May 2020 at UFC on ESPN: Overeem vs. Harris. Overeem was dropped and almost finished early in the first round, but went onto dominate the fight with ground and pound, eventually finishing Harris with a head kick and more ground and pound for a second round TKO win. Overeem faced Augusto Sakai on 5 September 2020 in the main event of UFC Fight Night 176. He won the fight via technical knockout in the fifth round. Overeem faced Alexander Volkov on 6 February 2021 at UFC Fight Night 184. He lost the fight via technical knockout in round two. On 3 March 2021, it was announced that Overeem had been released from his UFC contract. Kickboxing career Overeem had his first professional kickboxing fight at the age of 17, in a K-1 rules fight on , winning the fight. After that he fought against Paul Hordijk, winning by decision on . Overeem then moved on to K-1, having two K-1 fights in six years against Errol Parris and Glaube Feitosa. Overeem was knocked out in both bouts and stayed with MMA from then on. He did not fight in K-1 for four more years. On 31 December 2008, Overeem faced Badr Hari, one of K-1's top contenders, under K-1 rules at Dynamite!! 2008. He defeated Hari by way of knockout in the first round. K-1 On 28 March 2009 he faced Remy Bonjasky, the defending K-1 Champion, at the K-1 World GP 2009 in Yokohama. Overeem had success in the first and second rounds, but was knocked down by a right hook from Bonjasky in the third, who secured a unanimous decision win. All three judges scored the bout 30–28 in favour of Bonjasky. On 26 September, at the K-1 World Grand Prix 2009 Final 16, having been selected by fan voting after his impressive performances against Remy Bonjasky and Badr Hari, Overeem shocked the kickboxing