| ONE Fighting Championship: Champion vs. Champion | ||||
|---|---|---|---|---|
 The poster for ONE Fighting Championship: Champion vs. Champion | ||||
| Promotion | ONE Fighting Championship | |||
| Date | September 3, 2011 | |||
| Venue | Singapore Indoor Stadium | |||
| City |  Kallang, Singapore | |||
| Attendance | 6,789 | |||
| Event chronology | ||||
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ONE Fighting Championship: Champion vs. Champion (also known as ONE FC 1) was the inaugural mixed martial arts event held by ONE Championship. The event took place on September 3, 2011 at the 12,000 capacity Singapore Indoor Stadium in Kallang, Singapore.[1] It is the first and only event held by the organization in 2011.
- ^ "One FC Announces Inaugural Card; Baroni vs. Yoshida to Co-Main Event". mmafighting.com. 18 July 2011. Retrieved 2011-07-19.