Fulham have made a £15m bid for Ajax centre-back Calvin Bassey.
The 23-year-old has four years left on his deal at the Johan Cruyff Arena after joining from Rangers last summer.
Marco Silva is seeking to bolster his defensive options as the Cottagers look to build on a top-half finish on their return to the Premier League.
Despite his relative youth, Bassey brings strong experience and can play in the centre or on the left flank of a defence.
The Leicester academy graduate spent two years at Rangers, where he was an integral part of Steven Gerrard's Scottish Premiership-winning team and the run to the Europa League final under Gerrard and Giovanni van Bronckhorst.