The dispute intensified last week when UEFA filed legal papers in the United States seeking access to evidence and documents from FIFA. The request forms part of potential criminal proceedings being considered in Switzerland.
UEFA has made serious allegations against Infantino over the now-abandoned FIFA Forward Enterprise (FFE) proposal. The European governing body accused the FIFA president of "criminal mismanagement" and claimed the investment plan involved a "fraudulently off-market price" that was promoted for his personal benefit.
FIFA has strongly rejected those claims. In a court filing submitted in the US and seen by the BBC, football's global governing body asked the court to reject UEFA's request by the end of September.
FIFA maintained that the creation of FFE was only a proposal and could not have moved forward without majority support from its member associations and approval from the FIFA Council.
Rather than taking part in what FIFA described as a democratic process, the organisation claimed UEFA launched a public campaign against Infantino and FIFA leadership.
FIFA also alleged that UEFA had an economic interest in blocking the proposal because increased investment in football development outside Europe could strengthen smaller national associations and create greater competition for European football.
According to FIFA, providing additional resources to developing football nations could help those countries retain more players and encourage them to represent their countries of origin and compete in domestic leagues rather than moving abroad.
UEFA has been approached for a response to FIFA's latest court filing.
The European governing body has also asked a New York court to approve a legal order seeking testimony and documents from venture capitalist Joshua Kushner and his company, Thrive Capital. Kushner, the brother of Jared Kushner, who is married to US President Donald Trump's daughter Ivanka, was expected to be the lead investor in the proposed FFE project.
Thrive Capital had reportedly discussed a $4.2 billion investment with Infantino in exchange for a 20% stake in a new FIFA commercial subsidiary. The proposal was abandoned just days after details emerged publicly in July, triggering widespread criticism.
UEFA has emerged as one of the strongest opponents of Infantino as the controversy continues. The FIFA president is also facing calls to resign from three football confederations.
The legal dispute represents an increasingly public clash between FIFA and UEFA, with the two governing bodies now battling over the proposed investment scheme and Infantino's leadership.
