Manchester United's players and staff are in shock after a member of their backroom staff was rushed to hospital after a suspected overdose only one day out from their clash with Perth Glory at Optus Stadium.
The Red Devils coaching staff member, believed to be in his 50's, was sent for treatment at Royal Perth Hospital by the club's doctor.
He is in a stable condition tonight.
There is no suggestion the overdose was caused by an illicit substance.
It is not known if the medical emergency was caused by an existing condition or an accidental overdose of a prescription drug.
A United statement said: "A member of our backroom staff was taken ill overnight and has been sent to hospital by our club doctor for further treatment.
"We request that medical confidentiality is respected."
United will play their first of two preseason matches on Saturday night when they take on Perth Glory before playing Leeds United at the same ground on Wednesday.
The club will then travel to Singapore for their International Champions Cup meeting with Inter.
Ole Gunnar Solskjaer's side begin their Premier League campaign against Chelsea at Old Trafford on August 11.