Under-siege Matildas coach Hesterine de Reus has vowed she will be at the helm for Australia's Asian Cup campaign in May despite Football Federation Australia ordering a report into player complaints against her methods.

FFA chief executive David Gallop was in Brisbane on Sunday to watch the Australian women's side go down 1-0 to Brazil.

That result played second fiddle to revelations that Australian players have allegedly approached union body Professional Footballers Australia (PFA) to take action against 52-year-old Dutchwoman de Reus over her tough disciplinarian line.

Gallop said the governing body was working quickly to investigate the "concerning reports".

He confirmed that national technical director Han Berger, head of national performance Luke Casserly - who has been with the team this week - and former Matilda and current women's football co-ordinator Sarah Walsh would put together a report.