John Horan says Croke Park could hold up to 21,000 spectators for Championship games later this year under current Covid-19 restrictions.
The GAA President also believes that number could be doubled to 42,000 if social distancing is reduced from two metres to one metre.
The GAA’s roadmap to return will see inter-county action resume in October and Horan admits Croke Park may have to become an all-seater stadium, which would see bucket seats installed on Hill 16.
