ONE Fight Night 9: Nong-O vs. Haggerty was a combat sports event produced by ONE Championship that took place on April 22, 2023, at Lumpinee Boxing Stadium in Bangkok, Thailand.

[4] A bantamweight bout between Jhanlo Mark Sangiao and Matias Farinelli took place at the event.

[5] The pairing was previously scheduled to meet at ONE 164, but Farinelli has been removed from the card due to tested positive for COVID-19.

[6][7] A bantamweight muay thai bout between Ferrari Fairtex and Felipe Lobo was scheduled for this event.

[8] However, due to Ferrari losing to Fabio Reis by knockout at ONE Friday Fights 4, he pulled out from the event and was replaced by Saemapetch Fairtex.