Sunday Game presenter Michael Lyster remains in a serious condition in hospital after missing the programme for the only the second time in 31 years.
Mr Lyster (60), who suffers from a heart condition, was rushed to the Mater Hospital in Dublin on Friday where he was immediately admitted to intensive care.
Yesterday doctors made the decision to move him to the ICU unit of St Vincent's Hospital.
The father of four has spoken openly about a major health scare less than three years ago when his "heart was just gradually shutting down".
He was scheduled to present RTE's GAA coverage on Saturday and yesterday, but had to be replaced at the last minute.
In a statement the broadcaster confirmed that he is "receiving treatment"
RTÉ said it would not be making any further comment on the situation.
Joanne Cantwell took over the show on Saturday evening for the Leinster Championship clash between Mr Lyster's native Galway and Dublin.
Regular soccer presenter Darragh Maloney hosted the Sunday Game yesterday.
He made a brief reference to Mr Lyster's absence at the start of the programme, saying: "Our friend and colleague Michael Lyster was taken ill on Friday and he wasn't able to be with us today. We want to wish Michael all the best."
In an interview with the Irish Independent only last month, Lyster spoke of his previous health problems.
"Everyone thinks they are indestructible but then you realise you are not and that health can so easily be taken away from you," he said.
"Actually, fellas who get heart attacks, their hearts would be in better shape than mine was. My heart was just gradually shutting down. That's the scary thing about it," he said.