Gaizka Mendieta will retire when his contract with Middlesbrough expires, according to reports in Spain.
The 33-year-old Spaniard is currently frozen out of the first-team picture at The Riverside despite their current lowly position in the Premier League.
Mendieta was told in January he could leave and last featured for the club 12 months ago.
Now Valencia-based newspaper Levante claims that Mendieta will hang-up his boots next summer.
Should Mendieta quit, he will bring to an end a glittering career which will have spanned 17 years.
He helped Boro to their first ever trophy with the Carling Cup success in 2004 and was signed on a permanent deal.
But injuries curtailed his career on Teesside which led to him falling out-of-favour under Southgate.