Burnley's Monday Night Football clash with Newcastle was delayed by 30 minutes after the referee's assessor was taken ill in the Turf Moor tunnel.
Eddie Wolstenholme collapsed in the players' tunnel and was taken to hospital conscious.
Referee Anthony Taylor informed both managers prior to kick-off of the medical emergency and the Premier League decided to delay kick-off until 8.30pm.
Wolstenholme was formerly a Premier League referee who retired from officiating in 2003.
Assessors' reports play a part in deciding the allocation of referees for games, while providing match officials with feedback on their performance.
Newcastle went on to win the match 2-1 thanks to a Ben Mee own goal and Ciaran Clark header inside the opening 23 minutes, with Sam Vokes replying for Burnley before the break.