Chelsea sent their well-wishes to Ray Wilkins amid reports the former England captain is fighting for his life.
Wilkins, 61, suffered a heart attack at home and was put into an induced coma after arriving at hospital.
The club he started his career at and later enjoyed stints as a caretaker and assistant manager, Chelsea sent their regards to Wilkins and his family.
"The thoughts of everybody at Chelsea Football Club are with Ray Wilkins and his family tonight," the club wrote on Twitter.
"Keep fighting Ray, you have our love and support."
Wilkins played for the likes of Chelsea, Manchester United, AC Milan and Paris Saint-Germain in the 1970s and '80s, while he made 84 appearances for England before turning to punditry after his career ended.