The Socceroos face the Jordanians in Amman on 9 October (AEST) and PEC Zwolle's polished centre-back is determined to be there.
Sainsbury has played only 10 minutes of senior competitive football this season due to successive hamstring injuries but his recovery is almost complete.
He played a whole match for Zwolle's reserves in midweek and is in the mix to be selected for the weekend's Eredivisie home match against ADO Den Haag.
"The two strains were something I could not control but all is well now," said Sainsbury, who was a member of Australia's 2015 AFC Asian Cup-winning team in January.
"I played 90 minutes for the reserves against Heerenveen in midweek and I felt really good.
"It was the quickest I felt over the ground since the Asian Cup and did not feel too bad the next morning for recovery training.
"I think now that I've played 90 minutes without any problems I can look to play full games in the first team.
"I've been on the bench for the last two senior games and played in a friendly during the international break so there is a big possibility I will be involved again at the weekend. My match fitness is almost perfect.
"Funnily enough I did not watch the last two Socceroos matches (against Bangladesh and Tajikistan) because I was training but I watched the highlights.
"The Jordan match is very important and I don't think it is coming too soon for me. If I get selected I will be over the moon."
Sainsbury, who is 23 years old, was a key member of the Central Coast Mariners team that won the 2013 A-League championship and left the club a year later to further his career abroad.
He feels at home in the Eredivisie but he said that being on the sidelines, recovering from injury and not knowing when or if you will get back into the side, is one of the frustrating aspects professional footballers have to deal with.
"There is always the thought that the spot you once called yours could be ripped out from underneath you so quickly because of an injury," Sainsbury explained.
"But if you work hard and do the right things (during recovery) the spot will be yours again just as it was once.
"The problem is the team is doing well at the moment, lying fifth in the table two points from leader PSV, and it's hard to change a winning combination so I just have to be patient."
Sainsbury is halfway through his two-year contract with Zwolle and he admitted he has no idea where he could be playing next European season.
"My contract is half up," he said.
"The club has the option of one more year. It's exciting but also nerve-racking at the same time knowing I could be somewhere else shortly.
"If it was up to me I don't mind where I go as long as me and my partner are happy and enjoying it and I'm playing regularly.
"It's the life of a professional footballer, I suppose, but I can't imagine it any other way."
Sainsbury was asked to express his views on a common discussion topic among fans regarding the merits or otherwise of seeking lucrative contracts at the expense of valuable playing time.
"I'm open to any offers out in front of me," he explained.
"The whole idea of coming to Holland was to take the next step in my career.
"That step meant becoming a better footballer with a better income.
"Obviously I'd like to make a step up again in football and financial terms.
"It's a small window in which footballers have to achieve what they want.
"For many it is trophies and success with their clubs and countries and to be financially set for life after football. I'm no different."
