"Off, off, off," chant the Irish fans.

Naughty. Ireland's Rob Kearney is caught and tipped to the ground by Marika Koroibete.

Could the wing see yellow here?

Good from Ireland. They've recovered the ball and are now making ground through the phases around 30 yards out.

Can Ireland respond? All the talk was of the improvement Johnny Sexton would bring to Ireland but his first touch of the ball is from the restart after a couple of minutes.

Former All Black John Afoa with his verdict - nearly there already in terms of the margin John...

Bernard Foley gets the match under way with a short dink kick and the catch is missed by the Irish.

Devin Toner gets a fingertip on it but the ball bumps out for an Aussie line-out.

Not the best start.

But so do the Australians with a powerful rendition of Advance Australia Fair.

Here we go.

The Grand Slam winners in a must-win match against the Aussies in Melbourne. This should be fun.

"Irrrrrrreland, Irrrrrrreland, together standing tall..."

The Irish players look up for this and they're getting plenty of support from those in green in the stands.

But if the reception for the Irish was big, the one for the Aussies is even louder.

It's anthem time...

The Aussie players are giving each other pounding pre-match hugs in the dressing room.

Second place in the worlds rankings is on the line today.

The Irish have just emerged from their dressing room and get a huge roar as they jog onto the pitch.

John McEnerney: Sexton back at 10 we’ll match the intensity Aus will bring 2 the table unlike last week when we were off the pace. The best 9 & 10 partnership in the NH will show the SH what they’re all about. Ireland’s Big Game Players will step up today & make amends 4 last week

This is where the game is being played in Melbourne.

There have been a few showers around today which may well mean a slippery surface.

Will that favour Ireland?

Image source, Inpho

Kyle: Great to see Sexton back. I expect to see a stronger performance from both sides. I think Ireland will edge it and take this series to a decider. Hopefully it will be a better day for the sides from the northern hemisphere.

It's certainly a busy evening for sports fans Down Under.

Their rugby team is in action as you know but at the same time the Australian football team kicks-off in the World Cup against France and their cricketers begin the second ODI against England.

All three begin at 11:00 BST.

You, of course, can follow all three sports on our website but you'll wanna stay with this one I'm sure.

Last week's matches saw a switch around in the world rankings with New Zealand still leading the way, Ireland still second but Australia up to third and England down to fourth.

Eddie Jones' side could drop even further if they lose today.

What do you think about those rankings? Are they a fair reflection? Is this Ireland team today one rightly classed as the second best in the world?

And what about England? Is fourth about right following their recent slump or do they still have credit in the bank?

Let me know your thoughts on #bbcrugby or by texting 81111.

Cian Healy wins his 80th cap for Ireland today. How big an impact will he make on his return today?

Australia coach Michael Cheika meanwhile has named an unchanged line-up for the first time in his four-year tenure.

Replacements: Tolu Latu, Tom Robertson, Taniela Tupou, Rob Simmons, Lukhan Tui, Pete Samu, Nick Phipps, Reece Hodge.

Joe Schmidt has in fact made eight changes for this must-win match.

Fly-half Johnny Sexton comes in after only making the bench last week while Cian Healy, Niall Scannell and Tadhg Furlong form an entirely new front row.

Wing Andrew Conway and centre Garry Ringrose come into the back line and forwards Devin Toner and Dan Leavy also play from the start.

Replacements: Rob Herring, Jack McGrath, Andrew Porter, Tadhg Beirne, Jordi Murphy, John Cooney, Joey Carbery, Jordan Larmour.

The defeat for Ireland last week ended a winning run which stretched way back to March 2017 and gave Australia a 1-0 lead in the three-match series.

In a tight but entertaining match, Australia's David Pocock stood out at the breakdown and in attack, scoring one of the games two tries while the other came from Aussie fly-half Bernard Foley.

Ireland looked uncertain at times but today's XV looks much more like a full strength Irish team...

Image source, Getty Images