One is up there with the first name on the team sheet, the other a rank outsider who hasn't played for the Socceroos for three years.
But Aziz Behich, the Socceroos first-choice left-back, says he and deputy James Meredith are in it together at the World Cup.
Behich has made the position his own over the past year, fighting off challenges from young gun Alex Gersbach and Bournemouth's Brad Smith.
Meredith, 30, has come from the clouds to beat both Gersbach and Smith to a place in Russia, having been overlooked by former coach Ange Postecoglou since qualifiers with Bangladesh and Kyrgyzstan in November 2015.
The Millwall full-back has been brought back into the fold by new boss Bert van Marwijk.
Behich, 27, has started every match under the Dutchman and appears nailed on to start against France in the World Cup opener on June 16.
The former A-League defender doesn't see it that way.
"I never expect to start. I just work hard at training and the rest is in the coach's hands," Behich said.
"I'm happy just to be here but Mezza is a great player and a good teammate to have.
"We're close. We're always chatting. We help each other on the park no matter who's in the XI.
"At the end of the day we have one goal; whoever plays, we'll get the best out of each other."
Behich is based in Turkey - with Bursaspor - meaning he knew exactly what was coming through the Socceroos' hot weather camp in Antalya.
That didn't make it any easier.
Behich said the players were enjoying training and learning van Marwijk's plans for the World Cup but didn't complain when they were given a day off on Wednesday ahead of their final tune-up match with Hungary on Saturday (Sunday morning AEST).
"Recovery is important. We've been going hard the past couple of weeks," he said.
"We got a sleep in, went by the water and relaxed, switched the mind off. It was good to get the legs fresh as we have a game two days after.
"(Last week's friendly win over Czech Republic) was a good step forward and hopefully we can take another against Hungary.
"We will go out to win again, but what we want to see and what our preparation is for, is that we're ready for France."