Former Spain and Real Madrid defender Fernando Hierro has announced that he will retire from professional football at the end of this season.

“I’m clear about the decision but I wanted to leave it while I’m still playing at a high level,” the 37-year-old Bolton Wanderers player told Radio Marca on Monday.

Hierro joined Bolton on a one-year contract last July after a season in Qatar playing for Al Rayyan.

He joined Real Madrid from Valladolid in 1989 and was a mainstay of the team that won six Spanish league titles and three European Cups during a 14 year spell at the club. He made a record 89 international appearances as an outfield player for Spain, scoring 26 goals, second in the list of all-time goalscorers.