Fans have raised serious questions about Conor McGregor's suspected black eye. Photo / Getty
Conor McGregor's recent Instagram post caused a major fan melt-down.
McGregor posted a photo with his son from inside a private jet, however, fans weren't concerned by the flashy interior or gold watch on the UFC superstar's wrist.
Instead, they asked serious questions over the suspected bruise under his left eye.
Read more: Dana White, Conor McGregor still not impressed over Floyd Mayweather fight conspiracy
"We are having lunch on the jet on our way to Ibiza, and he is still after the watch too," McGregor captioned the post.
"My young son is like his father. A ruthless animal."
Many fans have already responded on Twitter, believing McGregor could be sparring ahead of his return to the Octagon.
Read more: Floyd Mayweather Jr. boasts $100 million cheque on Instagram
Rumours quickly swirled that McGregor had stepped up a notch in training, ahead of a potential comeback.
The 29-year-old was stripped of his UFC lightweight belt after Dana White revealed Tony Ferguson and Khabib Nurmagomedov are set to go head to head at UFC 223.
But with up-and-coming MMA star Nurmagomedov taking the division by storm, McGregor could soon have to face the Russian himself.
Read more: Conor McGregor throws a punch at an official
McGregor's coach, John Kavanagh, has also talked up the potential meeting with Nurmagomedov.
"They're on a path to meeting each other. So I'm of course watching everything that he does," he said.
To get the day's top sports stories in your inbox, sign up to our newsletter here
'What a sad watch. Whole thing was sad.'