At Manifest 1.0, this was two.

Fights must be physical combat activities, and I won't manipulate this market through the definition of fights. The fight must actually occur to count. For a fight to be gambled-on, there must be a prediction market about who will win. This market resolves to the nearest answer, to be split evenely if there is a tie. If there are duplicate answers, the most recently submitted one will be used. If I couldn't have figured out what an answer is before Manifest started, the answer will be ignored.

I will not bet on this market once Manifest starts.