The gifted Cork player was the victim of a second cautionable Colombian challenge in what was described as an overly physical friendly match, prompting Ireland boss Vera Pauw to approach referee Caitlin Williams and call a halt after just 19 minutes.
Although she apparently walked off the pitch at Ireland's team base in Meakin Park, O'Sullivan was due to have scans on the shin overnight in St Andrew's Hospital and manager Pauw will issue an update at 10am local time (1am Irish time).
And Colombian player Daniela Caracas poured salt into the wounds after an interaction with supporters with whom she was signing autographs was posted online.
"They are little girls,” she told a fan. “There was a tackle and they started to complain. They said they were going to see if they wanted to continue playing or not, so our coach said we are not going to wait for them to decide."
After the supporter said that it was the right decision, Caracas added with a loud “Let them eat s**t!”
Dr Siobhan Foreman treated O'Sullivan on the field while Irish physio Angela Keneally accompanied the 29-year-old to the hospital as the team continued to train after the incident.
"The behind-closed-doors game between the Ireland Women's National Team and Colombia on Friday evening was ended after 20 minutes of play," said an FAI statement.
"The game, which was held in Meakin Park, Brisbane, became overly physical and it was decided, following consultation with the match officials, to end the game.
“The Ireland team then underwent a full training session to continue preparations for their opening game in FIFA Women's World Cup 2023, against Australia in Sydney on July 20.”
Both teams had invited Irish media to observe, but not report on the game, but at the last
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