The UFC debuted in Boise, Idaho on Saturday night with UFC Fight Night 133 from the CenturyLink Arena.

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In the main event, former UFC heavyweight champion Junior dos Santos returned to action and earned a decision victory vs. ex-World Series of Fighting champion Blagoy Ivanov.

Dos Santos had been sidelined by a potential violation of the anti-doping policy, but eventually was cleared in the ordeal. The win was his first since a 2016 decision over Ben Rothwell.

Ivanov was handed his first loss since 2014, as he made his UFC debut. The defeat snapped a five-fight win streak.