Former Valencia fullback Miguel is interesting Wigan Athletic.
Miguel is available on a free transfer after leaving Valencia last summer and he recently held talks with Israeli side Maccabi Tel Aviv.
The 33-year-old has been invited over to the DW Stadium by Martinez, with the Wigan boss insisting it is not a trial.
"It's not a trial as such, I just want to see how he is," said Martinez in the Daily Mirror.