Chris Jones
BBC rugby union correspondent at Marvel Stadium

Lions lock Joe McCarthy remains touch-and-go for the second Test with a foot problem, and has yet to train since coming off early in the second half in Brisbane.

If he's out then Ollie Chessum or Tadgh Beirne would likely move into the second row, with the other at six, but it would open up a bench spot at least.

So plenty to play for tonight for the back five of the scrum: Cummings, Ryan, Morgan, Van der Flier and Pollock.

Image source, Getty Images

Lauren Jenkins
BBC Sport in Melbourne

Wallaby back-rower Pete Samu - who was controversially deemed ineligible for this match - is out on the pitch helping his team warm up.

He was initially named in the squad but was forced to withdraw as he had not played Super Rugby in 2025.

There is no doubt his presence on the touchline tonight will add extra motivation for this squad.

Tom English
BBC Sport at Marvel Stadium

All of the geography players being involved (and few of the Test contenders) could mean that we sniff about the importance of this game, but when you listen to Darcy Graham you understand that in his world this is the realisation of a life's dream. Of course it's not the biggest game but it's a Lions game and he, and the other first-timers, will have imagined what it's like to play for the Lions for an awfully long time. It's an enormous thing in their lives.

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Scotland's Darcy Graham starts on the right wing and is joined in the matchday squad by fellow late call-ups Jamie George and Jamie Osborne in the starting team.

More late call-ups are on the bench in Ewan Ashman, Rory Sutherland, Tom Clarkson and Gregor Brown.

This move by Andy Farrell has been compared to Warren Gatland's in 2017 after he added six players to the squad who were on tour with Wales or Scotland in Australasia.

Welsh quartet Kristian Dacey, Tomas Francis, Cory Hill and Gareth Davies were called up after featuring in Wales' victory over Tonga in Auckland, while Scotland's Allan Dell and Finn Russell were added after winning in Australia.

All six were named on the bench for the Lions' 31-31 midweek draw with the Hurricanes, with Gatland opting to rest his Test team before the second game against New Zealand.

Only Allan Dell and Finn Russell, because of a yellow card and an injury, came on against the Hurricanes after the backlash against the 'Geography six'.

Is this similar by Farrell?

The Lions back row performed wonderfully in Brisbane so it is impossible to see a change there, but what about the back-up?

Lock Joe McCarthy started the first Test but came off early with a foot injury and is a doubt for the second Test.

That would mean Ollie Chessum, if Saturday's player of the match Tadhg Beirne stays at six, would likely come into the second row.

Given there is cover on the pitch at lock, a back row bench spot may come available.

Jac Morgan, having played at seven throughout the tour, is now being given a shot at six.

Wales flanker Morgan was one of the big omissions from the first Test squad after some cracking performances on tour. Could some added versatility help his chances?

Morgan won player of the match against Queensland Reds and will want to push forward his case.

Josh van der Flier and Henry Pollock also came close to selection for the first Test and too will want to prove worthy of a bench spot.

Image source, Getty Images

Blair Kinghorn just can't catch a break in Australia.

The Scotland full-back arrived late because of his Top 14 commitments and made his Lions debut on the wing against New South Wales Waratahs.

It was all looking good for Kinghorn, who looked sharper than Hugo Keenan against the Waratahs, with a Test spot one big performance away.

But disaster stuck as he hobbled off against the Brumbies with a knee injury.

He is finally back after missing the first Test and will want to get back in the Test mix.

Keenan was solid in the first Test but was stripped by Max Jorgensen for Australia's first try.

Image source, Getty Images

Tom English
BBC Sport in Melbourne

Garry Ringrose, who is fit again, was having a storming tour before getting concussed against the ACT Brumbies in Canberra, which ruled the Ireland centre out of the first Test.

Does Andy Farrell dare to break up the Scottish midfield by picking Ringrose ahead of Huw Jones for Test two? If not, does he bring Ringrose on to the bench for Saturday ahead of countryman Bundee Aki?

A big performance will help Ringrose's case.

Image source, Getty Images

We will now take a look at who could realistically push for a Test spot.

Make sure and get your comments in.

19 July - Australia 19-27 Lions, (Suncorp Stadium in Brisbane)

12 July - Invitational AU & NZ 0-48 Lions, Adelaide (Adelaide Oval)

9 July - ACT Brumbies 24-36 Lions, Canberra (GIO Stadium)

5 July - NSW Waratahs 10-21 Lions Sydney (Allianz Stadium)

2 July - Queensland Reds 12-52 Lions Brisbane (Suncorp Stadium)

28 June - Western Force 7-54 Lions Perth (Optus Stadium)

20 June - Lions 24-28 Argentina, Dublin (Aviva Stadium)

Chris Jones
BBC rugby union correspondent at Marvel Stadium

If you can squeeze it in before kick-off, have a listen to our 5 Live show from last night as we discuss the relevance of today's fixture, the mood on the ground in Melbourne ahead of the second Test, and hear from Owen Farrell, Darcy Graham and Rob Valetini.

You can listen via this link.

Owen Farrell has only played half an hour of rugby in Australia against the AUNZ Invitational XV.

He did look sharp in that appearance off the bench and should be capable of starting his first game since 4 May.

His father and Lions head coach Andy Farrell said his son's lack of game time played a factor in him missing out on the matchday squad for the first Test.

Could a big performance put him in the Test mix?

Let us know your thoughts.

Chris Jones
BBC rugby union correspondent at Marvel Stadium

Just been down pitchside at the Marvel Stadium as the atmosphere builds in the hour before kick-off.

First out on the field for the Lions was fly-half Fin Smith, who was working on some drills with assistant coach Johnny Sexton.

While Smith hasn't yet been able to force his way into the Test team, working with a great number 10 like Sexton will be amazing for his development.

Tom English
BBC Sport at Marvel Stadium

At Marvel Stadium Owen Farrell was asked if he understood this phenomenon, this incredible passion he provokes in rugby people.

"Not really, no," he said. "No, not really," the 33-year-old repeated.

"But I understand that it's different now. I understand times are different and things catch fire quicker.

"Things grow legs, take a life of their own, go wherever they go and there's momentum behind them. But no, I don't always understand it."

There was a confusion there. A touch of sadness, almost. The former England captain became one of the greatest players of his generation not just on talent and leadership but on indomitable spirit and a capacity to let all the flak he faced wash over him.

It takes its toll, though. He is not a machine. The barriers came down a touch on Monday when he spoke and we got a glimpse of another side of him. And it was interesting.

"Both are a poison," he said.

Read more here.

Owen Farrell will captain the British and Irish Lions in Melbourne on his first start of the tour.

It marks the first time in four tours that he has skippered the Lions.

Farrell will play at inside centre alongside Ireland's Jamie Osborne in a Lions starting team that does not include any of the players who featured in the first-Test win against Australia.

Three Test players from Brisbane are on the bench - Ben Earl, Marcus Smith and Alex Mitchell.

Nigel Ringland
BBC Sport at Marvel Stadium

While there's enormous expectation about playing in the MCG on Saturday, the Marvel Stadium, home to a number of AFL teams, is pretty special.

It was a cold, rainy, windy day in Melbourne but no worries, we have a roof, and it's closed so the elements will not be a factor.

So it's off with the layers….

Slip and miss!

A reminder of that Kurtley Beale moment in 2013. If that last-gasp penalty went over then Australia would have went 1-0 up in the Test series.

A huge sliding doors moment in Lions history.

Image source, Getty Images

With a combined 153 Australia caps, Kurtley Beale and Taniela Tupou are the big names in the First Nations and Pasifika XV.

Flanker Charlie Gamble starts in the back row after impressing against the Lions for New South Wales Waratahs.

He won four turnovers in that game and the Lions simply could not deal with his ground work.

First Nations and Pasifika XV: Muirhead; Reilly, Foketi, Feliuai, Daugunu; Beale, Thomas; Ieli, Paenga-Amos, Tupou, Swain, Salakaia-Loto, Uru, Gamble, Tualima.

Replacements: Asiata, Pearce, Doge, Vocevoce, Leota, Goddard, Debreczeni, McLeod.