The kick off time for Burnley's Premier League game against Newcastle United was delayed by 30 minutes due to a 'medical emergency' in the players' tunnel.
Scheduled to commence at 20:00 GMT, the Clarets tweeted the news that the game would kick off half an hour behind schedule due to the emergency, which occured in the tunnel.
The individual has since been taken to hospital in a conscious state, after receiving initial treatment at the ground, with the referee Anthony Taylor taking the decision to delay the start of the game.
According reports including The Telegraph, it was referee assessor Eddie Wolstenholme who collapsed in the tunnel.
Wolstenholme was a former referee, and has officiated at both Premier League and Football League level.
Sean Dyche's side are without a win in their last five league games, losing three, while Rafael Benitez's side have won their last two games, having failed to win any of their first ten.
A win for either side will see them move level on points with West Ham United in 13th on 12 points, giving them breathing space from sides in the relegation zone.