Swansea boss Paul Clement has pledged to keep hold of prized assets Gylfi Sigurdsson and Fernando Llorente in the January transfer window.
Clement made his first Swansea acquisition with Holland winger Luciano Narsingh completing his £4 million move from PSV Eindhoven.
Swansea are also in talks with Norwich full-back Martin Olsson and Tottenham midfielder Tom Carroll, but it is keeping hold of two players linked to January moves away which could determine whether they win their Premier League survival fight.
Spain striker Llorente is Swansea's top goalscorer this season with six and has been at the centre of feverish speculation that he will rejoin his former Juventus boss Antonio Conte at Chelsea this month.