Ripped men: UFC fighter Conor McGregor & Cristiano Ronaldo square off at the gym (photos)

Cristiano Ronaldo currently on holiday in Las Vegas, Nevada paid a visit to UFC champion Conor McGregor's gym on Sunday as the fighter prepares to beat Nate Diaz next month.

Posting on Instagram, the Real Madrid superstar wrote 'Great to see you bro', while another picture of Ronaldo was later shared by McGregor's coach John Kavanagh.

McGregor also posted his own image of himself and the ripped Ronaldo, with the caption: 'My brother Ronaldo dropped by the gym today. He is an animal. 'Thank you @cristiano, much respect! I will see you for that Forbes number 1 spot next year.'