Brazilian striker Jair will provide fresh legs but coach Ernie Merrick is banking on the Jets' mental toughness to overcome Adelaide United at McDonald Jones Stadium.
The Jets arrived back in Newcastle on Thursday after Tuesday's 4-1 loss to Kashima Antlers in the Asian Champions League, and will have a training session on Saturday to prepare for the fourth-placed Reds.
Jair, who was left out of the squad for Japan, will replace injured marquee Ronny Vargas (hamstring).
The Brazilian scored a goal and set up another in the 3-1 upset defeat of Melbourne City last round.
Merrick is also likely to bring in another striker in a tactical change.
"It is good to have Jair who played an outstanding match against City. He will be ready to go," Merrick said.
"There is a good chance we will bring in another striker.
"We have been well prepared by Chris Smith from a physical perspective. Nathan Renwick has done a great job medically. It always comes down to mental toughness and if you can push yourself through the limits. I think we will be ready to go against Adelaide."
Merrick said the Jets had taken the loss to Kashima "on the chin" and were focused on "winning a spot in the finals".
"If we can take anything from a 4-1 loss it is how to play football really well," Merrick said. "Kashima Antlers are a very good team and you can see why they won the ACL. Their ability to close down, create space, play short accurate passes, work off each other and transition into goal scoring areas very quickly ... we can take something out of the experience."
The Jets played a counter-attacking game against Kashima but Merrick said he would revert to his preferred attacking game plan on Sunday.
"We will play a more attacking style which is what got us to the grand final last year," he said. "Hopefully it will get us into the finals this year. We haven't lost in three league games and have scored nine goals in those games. The boys keep bouncing back under pressure."
AAP reports, Adelaide boss Marco Kurz is expecting a full-throttle attack from the Jets.
The Jets are seventh on 22 points, six points shy of sixth-placed Wellington and Melbourne City.
And Kurz, whose Reds are in fourth with 30 points, believes Newcastle's delicate ladder scenario makes them an even more worrisome prospect.
"It's clear Newcastle's strengths are their offensive style; they have maybe one of the most (scoring) chances in the league," Kurz said. "We know what we expect from them. Newcastle, it's one of the important games for them to come closer to the ladder position six. It's a very important game for both of us."
The Jets have fired 222 shots at goal this season - second in the league - with Adelaide's 209 third. Yet for all the chances, Newcastle have scored just 24 goals and Adelaide 27.
Kurz dismissed any notion of meeting a Jets outfit jaded from the trip to Japan.
"What I expect is the strongest line-up and the strongest team from Newcastle," he said. "The game was on Tuesday, that means they have five days to the next game.
"They are professional players and (coach) Ernie (Merrick) is very experienced; he knows what to do."