Fans think they've spotted 'clue' over new UFC 303 main event as doubts grow over Conor McGregor fight

Fans think they have spotted a clue over the new UFC 303 main-event amid the mounting speculation about Conor McGregor.

As of right now, McGregor's comeback fight against Michael Chandler is set to headline UFC 303 on June 29.

But doubts are growing over McGregor as Ariel Helwani provided a huge update on the status of his bout with Chandler.

Amid uncertainty over his return fight, Jiri Prochazka has hinted at potentially replacing the Irishman in the main-event of UFC 303.

Prochazka was cageside for OKTAGON 58 in Prague last weekend and was interviewed by promotion co-owner Ondrej Novotny.

During the revealing interview, the UFC light-heavyweight star announced he has 'signed something'.

He said: "I would also like to announce that I have signed something, but we will have to wait because again my organisation is a bit late with it.

"So, I hope in a few days we will know and it will be out there and we will go for it."

The former UFC champion was then asked about speculation of him replacing the 'Notorious' at UFC 303 to fight Alex Pereira to which he replied: "Nice speculation, nice speculation."

He added: "There are even more variables, but if it will be discussed in Ireland, we'll see."

Prochazka's interview with Novotny got MMA fans online talking.

One X user wrote: "Time to run it back."

A second argued: "They should scrap the card because the only thing that made that card worth watching at all was the Conor fight. Without him, it’s a terrible card for international fight week."

A third commented: "Would be great to see him back in action. Unfortunately fans will hate the switch if it truly is for McGregor."

Prochazka hasn't fought since his destructive victory of Aleksandar Rakic at UFC 300.

Pereira also fought at UFC 300 as he defended his 205lbs crown against Jamahal Hill.

Pereira and Prochazka have fought before as they shared the Octagon at UFC 295 last November.

The Brazilian stopped the Czech fighter in controversial fashion to win the vacant UFC light-heavyweight championship.