Dustin Poirier has been warned Conor McGregor can "shut off his lights very, very rapidly" ahead of their upcoming rematch at UFC 257.
The pair are due to face off at UFC Fight Camp in Abu Dhabi on January 23 - more than six years since their last meeting in the Octagon.
McGregor won their last clash less than two minutes into their bout at UFC 178, following up on a strong left-hand before the referee stepped in to save Poirier from further damage.
While Poirier, 31, has had several big-name match-ups since, McGregor's long-time coach John Kavanagh feels previous events will still loom large over the American. "I think you can spend a lifetime going to sports psychologists and talking to this person and that person; that’s not going to
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