What happened: ONE Championship opened the main card for ONE Samurai 4 in Tokyo on Saturday at Ariake Arena. Early prelim action featured Sinsamut stopping former K-1 champion Shintaro Matsukura via head-kick knockout and Kota Abe earning a TKO over Shozo Isojima in under two minutes.

Why it matters: The Tokyo event is anchored by world title defenses from Jonathan Haggerty and Nadaka. The card is being distributed through the promotion's The Inner Circle subscription bundle.

What to watch: Haggerty and Nadaka will enter the ring for their respective championship bouts as the main card progresses in Tokyo.