Academica goalkeeper Ricardo has insisted that he is not concerned with the interest in him from clubs outside Portugal.
Scottish champions Celtic are said to be keen on the 31-year-old and sent scouts to watch him in action during his side's goalless draw with Belenenses in the Portuguese Primeira Liga on Saturday.
Celtic are said to be eyeing the Portuguese as a possible replacement for Fraser Forster, who could leave the Hoops in the summer, while Sevilla and Hannover are also believed to be monitoring his situation.
However, Ricardo, who will become a free agent in the summer when his current contract with Academica comes to an end, claims that he pays no attention to reports linking him with a move away from Coimbra.
"I know about the clubs who have been watching me but that does not concern me," the Daily Record quotes him as saying.
"I am a professional and I just want to help Academica get as far up the league as possible."