Twitter is heating up following the news that Jose Aldo will not fight Conor McGregor at UFC 189

The biggest fight of the year isn't happening and some people are not impressed.

Conor is sure he's going to get Aldo eventually...

They can run. But they can't hide.

— Conor McGregor (@TheNotoriousMMA) July 1, 2015

But some people were more upfront with their feelings about the Brazilian's withdrawal...

Jose Aldo you fucking spineless prick #UFC189 — Danny Harkin Jnr (@DannyHarkinJnr) July 1, 2015

Conor McGregor's coach was a little bit more light-hearted about the whole thing...

@Sholler_UFC@arielhelwanipic.twitter.com/rF7EUpcK05

— Coach Kavanagh (@John_Kavanagh) July 1, 2015

Of course there was speculation about what this really meant.

Pulling out of a title defence once is unlucky. Pulling out of a title defence for 5th time is ridiculous, amateur preparation. — David Mullins (@DavidMullinsMMA) July 1, 2015

pic.twitter.com/yoX0qmZBt1 — Seán Sheehan (@SeanSheehanBA) July 1, 2015

I'd imagine a very pissed off nation tomorrow morning. I'm sure the heatwave will end, too. Luck of the Irish. My arse! #UFC189

— Niall McGrath (@niallmcgrath4) July 1, 2015

McGregor is now favorite, but Mendes should win if he doesn't try to strike just take fight to ground whole time. On feet all bad 4 Chad. — David Kano (@TheDKano) July 1, 2015

Jose Aldo running scared! Connor got in his head! #UFC189

— Matthew Harry Dixon (@matthewdixon21) July 1, 2015

With the Aldo fight now done and dusted, John Kavanagh's focus turned squarely to Chad Mendes... https://twitter.com/John_Kavanagh/status/616039428713152512