Susperregui fought two of the best -95 kg Muaythai fighters,
Australians 2010,
Steve McKinnon for his
WBC Muaythai Super Cruiserweight World title and 2012,
Nathan Corbett for his
W.K.N. Muay Thai World title, he lost both fights by decision but put up a good fight. In 2011 he became WKN kickboxing oriental heavyweight champion defeating
Spains Damian Garcia, he was also double WKN kickboxing Grand Prix champion. In 2011 he defeated Tefik Bajrami and
Nicolas Wamba and in 2012 at
Le Banner Series he defeated Julius Mocka and
Enfusion Quest for honor tournament runner up
Frank Muñoz after tough fight and extra round. In 2012 he signed for
Glory and fought
It's Showtime -95 kg champion
Danyo Ilunga in his debut on 23 March 2013 in
London, losing by a
flying knee KO in round two. He won the NDC -100 kg/220 lb title with a decision win over Abderhamane Coulibaly at
La 20ème Nuit des Champions in Marseille, France on November 23, 2013. In February 2016, Stephane fought Ludovic Providence for the K-1 Event Light Heavyweight Championship -95 kg title. He won the fight by a first-round TKO. During the June 2017 Monte Carlo Fighting Masters event, Stephane fought
Sergej Maslobojev for the WAKO World K-1 94 kg title. Maslobojev won the fight by TKO, after Susperregui's corner threw in the towel in the fourth round. Susperregui took part in the 2018 Fight Night Saint-Tropez tournament. In the semifinals, he defeated Wladimir Tok by a third-round TKO, but lost the final bout against
Arnold Oborotov by decision. Stephane made his Glory debut against
Donegi Abena at Glory 60. Abena won the fight by unanimous decision. For his next fight, he was scheduled to fight
Felipe Micheletti, whom he defeated by decision, after an extra round was fought. He was scheduled to fight
Luis Tavares during Glory Collision 2. Tavares won the fight by unanimous decision. Susperregui participated in the K-1 Event -95 kg tournament, held on December 4, 2021. He won the tournament title after defeating Pascal Touré by decision in the semifinals, and Yuri Farcas by decision in the finals. Susperregui was booked to face Oleg Primachev in
Bilbao, Spain on March 26, 2022. The bout was later cancelled, as Primachev was unable to enter Spain due to the
2022 Russian invasion of Ukraine. ==Titles==