Olivier Coste

Professional MMA referee — 598 bouts officiated on record.

598

Bouts

219

KO/TKO

177

Submission

189

Decision

Finish rate (of decided bouts) 68 %

Where they've officiated

Recent bouts officiated

Paul Elliott vs Regan Upshaw 2026-06-26

One Championship - One on Prime Video 44 · KO (Head Kick)

Karen Ghazaryan vs Hisashi Ezaki 2026-06-26

One Championship - One on Prime Video 44 · TKO (Retirement)

Lucas Gabriel vs Rae Yoon Ok 2026-06-26

One Championship - One on Prime Video 44 · Decision (Split)

Kade Ruotolo vs Hiroyuki Tetsuka 2026-05-15

One Championship - One Friday Fights 154 · KO (Punch and Elbows)

Anatoly Malykhin vs Oumar Kane 2026-05-15

One Championship - One Friday Fights 154 · KO (Punches)

Lito Adiwang vs Eko Roni Saputra 2026-05-15

One Championship - One on Prime Video 43 · TKO (Punches)

Fabio Henrique Dourado vs Yosuke Saruta 2026-05-15

One Championship - One on Prime Video 43 · TKO (Arm Injury)

Kai Tang vs Shamil Gasanov 2026-05-15

One Championship - One on Prime Video 43 · TKO (Leg Kick)

Tatsumitsu Wada vs Seiichiro Ito 2026-04-29

One Championship - ONE Samurai 1 · Decision (Split)

Kouta Abe vs Hero Marco Manguray 2026-04-10

One Championship - One Friday Fights 150 · KO (Punches)

Rasul Rahimov vs Waldimir Britez 2026-04-10

One Championship - One Friday Fights 150 · Decision (Split)

Joshua Perreira vs Gilbert Nakatani 2026-04-10

One Championship - One on Prime Video 42 · KO (Spinning Backfist and Punches)

Koha Minowa vs Karen Ghazaryan 2026-04-10

One Championship - One on Prime Video 42 · Submission (Rear-Naked Choke)

Dzhabir Dzhabrailov vs Chase Mann 2026-04-10

One Championship - One on Prime Video 42 · KO (Punches)

Willie van Rooyen vs Jeremy Miado 2026-03-13

One Championship - One on Prime Video 41 · TKO (Elbows and Punches)