Vera Pauw has said Republic of Ireland supporters have a "responsibility" to use their tickets after empty seats were visible at last Thursday's clash with Finland, which had been billed as a sellout.
A record attendance of 6,952 watched Ireland earn a 1-0 win that sent them to the World Cup play-offs at Tallaght Stadium, which caters for up to 8,000 spectators, but areas of empty seats at the ground frustrated Pauw and those fans who were forced to watch on TV because they couldn't get their hands on a ticket.
Over 2,000 tickets were set aside for children through the clubs/schools initiative. The rest went on general sale.
It's accepted that there will be a natural drop-off of fans who do not turn up for matches due to a variety of reason - 5% to 10% generally - but the shortfall was higher than that and it did raise questions. On Thursday the FAI confirmed to RTÉ Sport they plan to review the reasons behind any non-attendance.
"I think it was teams [who didn't show] because there were a series of chairs open," said Pauw, speaking from Slovakia ahead of Tuesday's qualifier.
"They had bought tickets, but they didn't show up. That is a real shame because there were thousands of girls who wanted to come.
"Every ticket was sold. What do you do? Our marketing department are dealing with it, but what do you do? We want to have it accessible for everybody. You can make the tickets more expensive but then you put a lot of pressure on the people who maybe don't have much [money] available.
"You want everybody to be able to attend.
"My honest feeling is it comes back to the decency of the people who buy the tickets, that they know there's thousands of girls crying at home because they couldn't go to the stadium.
"You take responsibility when you buy a ticket."
Ireland will go straight into round 2 of the play-offs as one of the best three ranked teams if they beat a Slovakia side who have drawn with both Ireland and Finland in this qualification campaign.
Jamie Finn is suspended while Megan Connolly, Niamh Fahey, Ruesha Littlejohn are all injured.
Shelbourne's Jessie Stapleton and West Ham United's Isibeal Atkinson have both been called up to the squad, while Wexford Youths midfielder Aoibheann Clancy has also been drafted in to beef up Pauw's options.
"Confident," the manager replied when asked how she felt ahead of the game.
"We've had a huge emotional explosion on Thursday. The biggest thing is to get back on the ground… there is no game won without a fight. That's the biggest task. We don't do it with stress.
"We also have to realise we're missing a few players. Megan Connolly, Ruesha [Littlejohn] of course, Niamh Fahey and Jamie Finn who is suspended. We need to find a few solutions.
"We don't underestimate Slovakia. They are a very good football team. They have a good sense of positional play, they have skills to execute in small spaces, and there's a lot of street footballers in their team, so very mobile. It is a very dangerous opponent. We are fully prepared."
Republic of Ireland squad
Goalkeepers: Courtney Brosnan (Everton), Grace Moloney (Reading), Megan Walsh (Brighton & Hove Albion), Eve Badana (DLR Waves)
Defenders: Harriet Scott (Birmingham City), Claire O'Riordan (Celtic), Diane Caldwell (Reading), Louise Quinn (Birmingham City), Jessie Stapleton (Shelbourne), Hayley Nolan (London City Lionesses), Chloe Mustaki (Bristol City), Megan Campbell (Liverpool), Áine O’Gorman (Peamount United)
Midfielders: Katie McCabe (Arsenal), Denise O’Sullivan (North Carolina Courage), Ciara Grant (Hearts), Lily Agg (London City Lionesses), Ellen Molloy (Wexford Youths), Jess Ziu (West Ham United), Lucy Quinn (Birmingham City), Isibeal Atkinson (West Ham United), Aoibheann Clancy (Wexford Youths)
Forwards: Heather Payne (Florida State University), Amber Barrett (FFC Turbine Potsdam), Leanne Kiernan (Liverpool), Abbie Larkin (Shelbourne), Saoirse Noonan (Durham WFC)
Follow Slovakia v Republic of Ireland via our live blog on RTÉ.ie/sport and the RTÉ News app, watch live on RTÉ2 and the RTÉ Player or listen to national commentary on RTÉ Radio 1 Extra.
