The injury suffered by Nottingham Forest striker Taiwo Awoniyi has raised questions about the future of the offside law.
The 27-year-old was placed into an induced coma on Tuesday after requiring surgery on an abdominal injury sustained when he collided with the post in a 2-2 Premier League draw against Leicester City at the City Ground.
Awoniyi was attempting to get on the end of a cross by winger Anthony Elanga.
Sources have told BBC Sport that Awoniyi suffered a ruptured intestine.
He received medical attention for several minutes and was substituted after attempting to play on.