The 20-year-old is also wanted by Italian giants Fiorentina, according to The Daily Mirror.
Martinez joined Bilbao in a £5.3million move for Osasuna as a 17-year-old in 2006.
The 20-year-old is also wanted by Italian giants Fiorentina, according to The Daily Mirror.
Martinez joined Bilbao in a £5.3million move for Osasuna as a 17-year-old in 2006.
