The former England defender Sol Campbell announced his retirement from football.
Best known as a centre-back with north London rivals Tottenham Hotspur and Arsenal, Campbell also played for Portsmouth and, more recently, Newcastle.
But the 37-year-Campbell was released by Newcastle at the end of last season and has not been able to secure a new deal with another club, partly as a result of injury.
At international level, Campbell won 73 caps for England and appeared in six successive major tournaments for his country.
