The OFC Champions League Qualifier kicks off in Nuku'alofa today with all four teams sensing an opportunity to advance to the main draw.
Lupe Ole Soaga won the Preliminary tournament two years ago and coach Paul Ualesi believes his players are well equipped to repeat.
"We've really prepared hard for all of the opponents because we don't want to underestimate any team," Ualesi said.
American Samoa champions Utulei Youth finished third in the Preliminary stage 12 months ago.
Coach Pita Sinapati said, with the top two teams now advancing to the Champions League, they fancy their chances.
"The way our team prepared we have a big chance - either (finishing number) one or two at least. We have that motivation, that confidence we can make the second round."
"Our key is teamwork and the confidence from each player to set that goal of a win against Lupe (Ole Soaga in the first match) and give a best fight as hell as we can possibly get if we want to win," Sinapati said.
In the later match today, Tongan champions Veitongo take on Puaikura FC from the Cook Islands.
Veitongo failed to win a game last year but coach Timote Moleni said they're looking forward to playing in front of their home support.
"We don't know much about Puaikura or the players they have from overseas but we know they will be a big challenge," he said.
"They are the main team of our focus. If they win our game, I think the Puaikura team will definitely have a place in the Champions League.
"I'm confident in Veitongo and I am happy to face any challenge with them because I know the team came here for the game. They are here to play football."
Puaikura coach Matt Calcott is focusing on his own team's performance, ensuring they play their best game regardless of their opponent.
"It's pretty tough in the qualifier to find out a lot of information about the other teams but I think what will be important for us is that we concentrate on our own performance on Saturday," he said.
"The physicality of all the teams will be a big challenge for us," he said.