Bolton have completed the signing of Spanish defender Cesar Martin until the end of the season.
Martin needs to get fit before he plays in the Premiership
The 29-year-old is able to join the Premiership club immediately as his contract with Spanish side Levante was cancelled at the end of last month.
Martin has made more than 200 starts in La Liga and has been capped for Spain nine times, although not since 2004.
Boss Sam Allardyce told the Bolton website: "Cesar can make an impact in the last 11 games of the season."
He added: "I am delighted to sign Cesar. I had been monitoring him for quite some time.
"Once he became a free agent, we moved quickly to secure his services.
"He has some key attributes, which will potentially strengthen our defensive unit once he reaches the optimum level of fitness."