Conor McGregor is facing backlash on social media for heaping praise on US President Donald Trump.
The Irish UFC superstar's comment came after his long-awaited comeback to the sport on Sunday (NZ time), when he mauled Donald 'Cowboy' Cerrone at the main-event bout in Las Vegas.
McGregor replied to a Twitter post by Trump on Martin Luther King Jr Day (Tuesday NZ time). Trump's tweet said the day coincided with his third anniversary as US President.
"Phenomenal President," McGregor replied, adding Trump was "quite possibly" the US' greatest of all time.
He went on to say Trump was "incredible".
"Congrats and happy Martin Luther King Jr day America," McGregor wrote.
Social media immediately exploded into life. Responses flooded in with people saying they were no longer fans.
"Oh Conor - so heartbreaking," one Twitter user said.
"Just got off the McGregor bus, I was a huge fan until this tweet," another wrote. "I'm sure this will cost you more fans than any fight you lose."
Trump responded by praising McGregor for his triumphant return.
"Congratulations on your big UFC WIN!" Trump wrote.