Conor McGregor's trainer John Kavanagh has told that the first thing he checks is a fighter's 'ass' to determine their power capabilities.
The mixed martial arts expert has been coaching McGregor since his beginnings in UFC and also guides many other combat artists.
But his method of scoping out the power potential in any new recruits is quite unusual.
“First thing I check on a fighter is their ass,” he wrote on Twitter. “Then their arms.
“The bigger the ass and the smaller the guns the more confident I’ll be in their ability to generate power.
“Big guns and pecs tells me they’re preparing for the beach. All show, no go!”
McGregor first met Kavanagh when he was 17 and has gone to become a two-weight UFC world champion and one of the biggest names in world sport.
It is unclear though if the pair will work together again as McGregor recently announced that he was retiring from fighting - albeit it is third time in four years that he has announced his retirement.
The Dubliner's media company have asked fans who they would like to see the Dubliner fight next - one week after he announced his retirement from MMA.
The Notorious made the shock announcement last Sunday morning, saying "the game just does not excite" him anymore.
Speaking to ESPN's Ariel Helwani, he said: "The game just does not excite me, and that's that.
"All this waiting around. There's nothing happening. I'm going through opponent options, and there's nothing really there at the minute. There's nothing that's exciting me.
"They should have just kept the ball rolling. I mean, why are they pushing [Khabib Nurmagomedov vs. Justin Gaethje] back to September? You know what's going to happen in September, something else is going to happen in September, and that's not going to happen.
"I laid out a plan and a method that was the right move, the right methods to go with. And they always want to balk at that and not make it happen or just drag it on.
"Whatever I say, they want to go against it to show some kind of power. They should have just done the fight -- me and Justin for the interim title -- and just kept the ball rolling."
He added: "I'm a bit bored of the game. I'm here watching the fight. I watched the last show -- the Woodley-Burns show -- I watched the show tonight. I'm just not excited about the game, Ariel. I don't know if it's no crowd. I don't know what it is. There's just no buzz for me."
McGregor claimed that the UFC have offered him "stupid" fights.
He said: "I had my goals, my plans, the season. I had everything laid out. Obviously the world has gone bleeding bonkers at the minute. There's f*** all happening at the minute. They want to throw me up and down weights and offer me stupid fights. I don't really give a f***. I'm over it."
One week after the announcement, The Mac Life posted on Instagram: "FILL IN THE BLANK: If @thenotoriousmma was to come out of retirement, I would like to see him fight _____ next."
The post was liked by McGregor's dad Tony, which suggests he might think his son will fight again.
Jorge Masvidal was a popular reply to the question, while old foes Khabib Nurmagomedov, Nate Diaz and Floyd Mayweather were also named numerous times in the responses.
Justin Gaethje defeated Tony Ferguson at UFC 249 last month and both those men were also suggested as potential opponents for McGregor.
