Crystal Palace have enquired after Sporting Lisbon's £40million-rated defender Ousmane Diomande and have held positive talks over a new contract for striker Jean-Philippe Mateta.
Palace face competition for Diomande, 21, who would be viewed as a replacement for Marc Guehi.
Meanwhile, Mateta, who has attracted attention from Manchester United, Aston Villa and Marseille, has held positive discussions over staying at Selhurst Park.
Palace anticipate offers will come from Newcastle and Chelsea for Guehi.
The Magpies made a plethora of failed bids for the England international last summer, whom Palace demanded £70m for.