Celtic could be ready to offload Stephen Welsh in the January transfer window, with Portuguese giants Porta believed to have entered the race to sign him.
Welsh, from Coatbridge, has played just six times for Ange Postecoglou's side this season, and has a host of defenders in front of him at the Scottish champions.
The imminent arrival of Japanese star Yuki Kobayashi could push him further down the Parkhead pecking order, and the 22-year-old might decide his future lies elsewhere.
