Born in Amsterdam, Hari made his professional kickboxing debut in 2000, and quickly rose to fame with his aggressive and explosive style.

In 2014, he won the GFC Fight Series 1 Heavyweight Tournament Championship when he defeated Peter Graham by technical knockout in the first round.

In 2016, he made his Glory debut in a highly anticipated bout against Heavyweight champion Rico Verhoeven, which he lost by technical knockout (Arm injury) in the second round.

In his teenage years he worked with the trainer Thom Harinck at Chakuriki Gym and it was at this time he started to become known on the Amsterdam scene.

A year later he was fighting in front of an audience of thousands at the Johan Cruijf Arena, the biggest soccer stadium in the Netherlands.

Hari took the fight on short notice and lost, but won respect from the crowd and from Ignashov for his display of heart.

[citation needed] Hari returned to the ring at the K-1 World Grand Prix 2006 final elimination in Osaka, Japan against Ruslan Karaev.

[citation needed] Despite being knocked out, Hari was once again picked as a reserve fighter in the K-1 Grand Prix 2006 Finals against Paul Slowinski.

[citation needed] On 28 April, at K-1 World GP 2007 in Hawaii, Badr Hari and Yusuke Fujimoto fought for the newly introduced Heavyweight belt.

All of Hari's wins in 2008 were by knockouts, by beating Ray Sefo in Yokohama, Glaube Feitosa (whom he defended his heavyweight title) in Fukuoka and Domagoj Ostojic in Hawaii.

On his next fight in Seoul he qualified for the K-1 World Grand Prix 2008 Final by TKO win over the Korean Hong Man Choi.

[citation needed] In the quarterfinals on 6 December, Hari defeated three time K-1 World champion Peter Aerts by TKO in the second round.

After suffering a knockdown in the first, Hari was disqualified in the second round for unsportsmanlike conduct by having stomped and punched an already downed Bonjasky.

[37] While there were many rumours of his and his opponent's participation, it was finally announced that Hari would face MMA Heavyweight Alistair Overeem in a K-1 rules match on K-1's New Year's Eve extravaganza Dynamite!!

[41] In September 2009 at the K-1 World Grand Prix 2009 Final 16, Hari again used his right body shot to score a first-round knockout over Zabit Samedov.

Then in the final of the World Grand Prix Hari lost in a rematch against Semmy Schilt by KO after being knocked down 3 times in the first round.

Though the biggest interest was for Badr to rematch Hesdy Gerges for the Showtime heavyweight title it was announced that he would fight Romanian Daniel Ghita in September.

Ghita had lost a decision against Gerges earlier in the year, but many felt he had been robbed and viewed him as a tough opponent for Hari.

Hari stated that he will compete in the 2011 K-1 World Grand Prix in October and December, and then face Gökhan Saki in the Netherlands on 28 January 2012 as his final match.

[54] Hari scored a knockdown early in round one and forced a standing eight count in three, after which he simply jogged away from Samedov for the rest of the fight while the Azerbaijani taunted him.

[67] Hari won a four-man (Tammam Majzoub was supposed to be in this fight but cancelled due to busy schedule) tournament at GFC Series 1 in Dubai, United Arab Emirates on 29 May 2014, having his rubber match with two former foes; he knocked out Stefan Leko in the semi-finals and scored a TKO over Peter Graham in the final.

[70] On 6 July 2014, Hari announced via social media his intention to take an indefinite leave from kickboxing in order to find himself.

He was issued with a 19-month suspension after tests on samples provided indicated a violation of Doping Autoriteit Netherlands rules regarding prohibited substances for competitive athletes.

Early on in the third round however, Hari suffered a broken ankle from a missed kick, once again rendering him unable to continue competing.

[87] Hari had a great start to the bout and managed to knock Wrzosek down three times with body shots before the midway point of the fight.

Halfway through the second round however, Wrzosek landed a head kick which knocked Hari out, extending his winless streak to five fights.

"[108] At his conviction on 21 February 2014, the district attorney described Hari as an individual who is very short-tempered, indulges in vulgar power display, and demonstrates aggressive and intimidating behavior which is characterized by a high "do-you-even-know-who-I-am caliber".

[120][121] On 21 January 2013 a court in Amsterdam determined that Hari should again be released from his pre-trial detention, this time with the condition that he could not visit catering establishments between the hours of 8:00 PM and 8:00 AM.

[123] His trial was reportedly set to take place in March 2013;[124] he faced nine charges including aggravated assault and attempted manslaughter.

[128] Hari was reportedly arrested in Dubai following his tournament win at Global FC 3 on 29 May 2014, and he was detained and questioned by police over an alleged incident from late 2011/early 2012 before being released, according to his lawyer.