Frank O'Farrell, the former manager of Manchester United and Leicester, died on Monday at age 94.
As Leicester manager during his three years with the Foxes, he led the club to the 1969 FA Cup final, which they lost to Manchester City.
In 1971 he replaced Matt Busby as manager at Old Trafford, which was a short tenure.
Although his Old Trafford reign lasted only 18 months, he was best known as the man who succeeded Matt Busby as United manager in 1971.
Despite starting the season on top of the league at Old Trafford, the Red Devils shed their winning ways, finishing eighth in the table.
Man U expressed the shock and grief in the death.
We are deeply saddened to learn that our former manager, Frank O'Farrell, has passed away aged 94.
Sending thoughts and prayers to his family and friends at this difficult time reads official statement.
In December 1972, Tommy Docherty became the new manager after O'Farrell was sacked.
In addition to managing Cardiff, he also managed the Iranian national team and Al-Shaab of the United Arab Emirates.
Leicester statement paid the tribute to one of the legendary manager in the history of club and the statement reads.
"It was with great sadness that the club heard the news that former manager Frank O'Farrell died on 6 March, 2022, aged 94," the club said.
"The thoughts of everyone at Leicester City Football Club are with the family and friends of Frank at this sad time."