Former Tottenham Hotspur captain Gary Mabbutt is set to have heart surgery, the club said on Monday.
The 55-year-old was taken to hospital after experiencing chest pains and breathing problems.
"Gary Mabbutt was admitted to hospital this morning where he will undergo heart surgery later," Spurs said on Twitter.
"Everyone at the club wishes our legendary former captain a speedy recovery. Get well soon, Mabbsy."
The former England international defender played for Tottenham for 16 years between 1982 and 1998.
He was part of the Spurs side who won the Uefa Cup in 1984 before captaining them to FA Cup final victory in 1991.