Former Liverpool player Lucas Leiva has announced his retirement from football, aged 36, because of a heart condition.
The issue was detected in pre-season testing with Gremio, the Brazilian defensive midfielder's boyhood club, for whom he re-signed in the summer.
Leiva was signed from Gremio for £5m by Liverpool in 2007 and went on to make 346 appearances in 10 seasons at Anfield.
"I can only be thankful for the career I built," Leiva said on social media.
"The day has come to say goodbye to the field. I confess that it came from greater forces.