Sky Sports News understands that Swansea have bid for Fulham goalkeeper David Stockdale.
The Premier League new-boys are attempting to reinforce their squad ahead of the new season and have already brought in striker Danny Graham and defender Steven Caulker.
Villarreal midfielder Marcos Senna and Barcelona striker Jonathan Soriano are also targets, but Stockdale has emerged as another man on Brendan Rodgers' wanted list.
Dorus De Vries was first choice at the Liberty Stadium and started 46 matches as promotion to the Premier League was earned via the Championship play-offs.
However, the Dutchman has switched to Wolves and Stockdale would provide a replacement and may relish a fresh opportunity after being restricted to a role as back-up to Mark Schwarzer at Fulham.
Swansea have consequently decided to test the resolve of their new top-flight rivals by making an offer for the former Darlington player.
Stockdale made just seven appearances last season, but has still been included in England squads in the past after being called up as cover by Fabio Capello.
Fulham boss Martin Jol said at the end of June that he would not sell the 25-year-old and would instead aim to find a loan option.
Stockdale joined Fulham in 2008 from Darlington and has already undertaken temporary spells at Rotherham, Leicester and Plymouth.
The shot-stopper may therefore welcome the chance of a permanent move elsewhere and could put pressure on Jol.