Fulham have had a £20million bid rejected for Crystal Palace defender Joachim Andersen.
Palace value the 28-year-old Denmark international at £40m.
Fulham also had a bid rejected for Aston Villa centre back Diego Carlos, 31, last week but talks are continuing.
Meanwhile, Villa are keen on 24-year-old Feyenoord defender Lutsharel Geertruida, who can play at right back or as a central defender and has been capped 11 times by the Netherlands.
Villa have interest in Tottenham attacking midfielder Giovani Lo Celso, 28, as well.