A DUP MP has denied that the Democratic Unionist Party is against the redevelopment of Casement Park in Belfast, but said the GAA should contribute more money to the project.
Gregory Campbell said that "certain things" need to happen to uphold the "principal of proportionality".
Speaking on RTÉ's News at One, Mr Campbell said the work was originally given the go ahead alongside the redevelopment of Windsor Park for football and Ravenhill for ruby with proportionate amounts of money been given to each sporting discipline.
The Casement Park redevelopment has been delayed by a series of legal challenges and further complicated by the lack of a functioning Stormont Executive.
The project has also been hit by rising costs, with an original projected price tag from almost a decade ago of £77.5 million (€90m) now believed to have spiralled well above £100m (€116m).
Earlier this week, it was confirmed that Ireland and the UK will jointly host the Euro 2028 soccer tournament with Casement Park listed as one of the stadiums where matches will be played.
Mr Campbell said the DUP does not support additional funding for the work and believes the GAA should double its contribution.
"The GAA need to pay the proportionate amount that they agreed to pay which initially was 15 million when the overall cost was about 80 million. Now that it has almost doubled, we would expect the GAA to pay roughly double what they initially agreed to pay.
"If they can do that, and your own Government in the Republic have said that they would put some money into the pot to help the redevelopment of Casement Park, that should free up money from our own government to help redevelop the other football stadia in Northern Ireland that haven't been redeveloped during the time that Windsor and Ravenhill were redeveloped and Casement should have been, but was not able to."
Mr Campbell said there is no question that the stadium could be a good thing for Northern Ireland "if it is done right".
"But if the monies are coming in from the sources that we are told they are coming in [from]. If we can restore the parity basis so that rugby, and gaelic and football all benefit from this.
"There are other grounds, football grounds in Northern Ireland that dramatically need additional funding. If the money can be found for that then any reservations or caveats will all disappear, and it will be a genuine win, win."
Opposition to UK govt funding of Casement redevelopment 'incomprehensible' - McDonald
Sinn Féin leader Mary Lou McDonald said she finds the DUP's opposition to UK government funding to redevelop Casement Park "incomprehensible".
"Casement Park is a flagship project. It's been agreed and it's been delayed for ten years.
"It's been agreed and it’s going to happen, and I think that’s a fantastic news story for everybody concerned," she said during a visit to Belfast.
"You now have two governments involved ... countless soccer leagues involved and the wider sporting community and I think, for the North in particular, the opportunity and the economic drive that this can bring will just be immense.
"I find it incomprehensible that anybody would be against something that brings so much obvious good for everybody.
"This is a good news story for everybody right across the board for sport, for the economy, and for relationships between Britain and Ireland, north and south.
"So I think rather than complaining about it, or as some might say looking a gift horse in the mouth, we need to grab this now with both hands, make it happen."
Ms McDonald also said that politicians should follow the example of sporting associations backing the redevelopment.
"I think that everybody in politics should take their lead from the sporting associations themselves," she said.
"Because what I know is that the IFA and the IRFU, along with the GAA, are very much behind this project, and I think they're leading from the front.
"I want to commend them for their collaboration, for their sense of what is good collectively for everybody across the North.
"I think everybody in politics, let’s just take note of that and follow that example."
Additional reporting Vincent Kearney, PA
