Ireland coach Joe Schmidt is suffering from suspected appendicitis and has gone to hospital for a check-up, following Ireland's 26-23 victory over Australia.
The 49-year-old New Zealander, managed to get through the nerve wracking game, before opting to go to hospital.
He had not hinted at the pain he was feeling when he spoke to RTÉ after the match.
However, he did say, when asked would the win set them up for retaining the Six Nations title: "I'm just hoping to survive tonight."
The team spokesman said Schmidt had been in agony all day before Ireland's first double over the Wallabies and the Springboks since 2006.
Irish rugby spokesman said: "He manned up today but he had to go to hospital after having been looked at here at Lansdowne Road."
Ireland captain Paul O'Connell, named man of the match, said Schmidt had not said a word about his illness.
"He was as normal stand-offish," grinned the 35-year-old Munster lock.
"He didn't come too close to us all day in case it was something catching. He didn't want to distract us from our focus. That's the type of man he is" he added.