Nottingham Forest are said to have shown an interest in Portuguese defender Ruben Vinagre.
But they are not the only club being linked with the Sporting left-back. Fulham and Turkish outfit Fenerbahce are also keen, according to reports in Portugal.
Reds head coach Steve Cooper has made three signings so far this summer, and further business will be done as he puts together a squad ready for the step up to the top-flight. Left wing-back is one of the areas he will look to strengthen, in preparation for the club’s return to the Premier League.