New UFC 303 poster released featuring short-notice headliners Alex Pereira, Jiri Prochazka

UFC 303 looks a lot different than it did less than a week ago, as shown by the new poster released for the event.

UFC CEO Dana White revealed on Thursday night that the original main event between the returning Conor McGregor and Michael Chandler is no longer happening on the June 29 pay-per-view event, and that a rematch between Alex Pereira and Jiri Prochazka is the new headliner for the light heavyweight championship.

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