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

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.