Southampton's former England midfielder Jamie Redknapp has announced his retirement from football at the age of 31, because of a long-term knee injury.
Redknapp, who won 17 caps and also played for Liverpool and Tottenham, had visited a specialist in America who is thought to have advised retirement.
"He's been forced to stop or he could have ended up a cripple," his father Harry told the News of the World.
"It's been a hard decision but he has had to put his long-term health first."
Redknapp made 17 appearances for Saints after arriving from Tottenham last January on a free transfer to play for his father.
He only joined on a deal until the end of the season but had hoped to help the side return to the Premiership following their relegation.
Redknapp's career began as a trainee at Bournemouth - where Harry was manager - before he joined Liverpool as a 17 year-old in January 1991.
In his 11 years at Anfield he made 310 appearances, including 38 as a substitute, before joining Tottenham on a free transfer in July 2002.
Just as they had towards the end of his time at Liverpool, injuries hampered Redknapp's appearances at White Hart Lane.
In two-and-a-half years at Tottenham he made only 53 appearances in all competitions, including 11 as a substitute.
Redknapp scored one goal in his 17 appearances for England.