Leicester prop Marcos Ayerza has retired from professional rugby.
The Tigers and Ayerza announced that the decision will take immediate effect following an 11-season stint at Welford Road.
He has been advised to end his career because of a back injury.
The 34-year-old Argentina international made his final Leicester appearance in the victory over Harlequins last November.
Ayerza joined the Tigers in 2006, going on to make more than 200 first-team starts, while a 66-cap Test career included taking part in three successive World Cup campaigns.
"I have been extremely proud to represent Leicester Tigers and Argentina for so many seasons, and enjoyed every minute of that long journey," Ayerza said.
"I will take with me many great memories experienced by playing this great game of rugby, but more importantly the best thing to take with me is all those great people I met on this journey along the way.
"I will miss a lot, but it is time to face new challenges in my life, turn over the page - as hard as that is - and I wish the Tigers all the very best for the future."
Leicester chairman Peter Tom added: "Marcos has been an outstanding representative of the club on and off the field in more than 10 years at Tigers.
"He has been at the very heart of the Tigers squad for the last 11 seasons and continually worked hard on his game, while also assisting those around him.
"He has been without doubt one of the leading players in his position in the world game."