The pair of UFC stars were in embroiled in a war of words ahead of their championship contest, but the Dagestan fighter did his talking inside the Octagon.
He produced a terrific performance, submitting the Irishman in the fourth round of their main-event bout.
Nurmagomedov was even heard speaking to McGregor during battle and exchanged words on the ground.
'The Notorious' was caught saying "it's just business" in between rounds.
And reflecting on McGregor's showing at UFC 229, 'The Eagle' reveals he was disappointed by his foe's showing on fight night considering his pre-fight tirade.
"Conor's trash talk? Yes, he had talked for a while (during the fight), but when I started pushing him, he immediately switched to the 'it's just business' mode," he said.
"I was even a bit disappointed. I expected him to be mentally tougher."
The 32-year-old added: "When I was ground-and-pounding him, talking to him, and he responded that it was 'just business', it looked like he was trying to calm me down to avoid a real beating, just like a son trying to justify himself in front of his angry father.
"Psychology is a very strong tool."
Nurmagomedov walked away from the UFC after beating Justin Gaethje last October.
A comeback has been mooted with McGregor hoping to lure him out of retirement for a blockbuster rematch.
As for the former UFC double champion, he's set to return to action next month when he rematches Dustin Poirier at UFC 257.
Featured Image Credit: YouTube/PA
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